Danny Kodicek (but, y'know, spooky)
@dannykodicek.bsky.social
460 followers 870 following 1.9K posts
Trying to limit my social media exposure but can't quite shake it. Random mix of furious politics, obscure maths, and bad jokes. D&D account @dndwithplumbing.bsky.social. He/him
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dannykodicek.bsky.social
Ooh! This is fascinating. I was noodling around this sequence on OEIS and discovered an even simpler way to write it. I don't yet know why it works, though! (I'm using sf(n) here for the superfactorial instead of n!!)
dannykodicek.bsky.social
(Sadly the !! notation is already reserved for the double factorial. This thing is called the superfactorial and doesn't have a fun exclamation-mark-based notation of its own)
dannykodicek.bsky.social
This is quite nice. If we define n!! to mean 1!·2!·3!·...·n!, then we can write the solution as

√((2n)!!·n!)
________
(n!!)²·√(2^n)
dannykodicek.bsky.social
An alternative way to write it is

1!·3!·5!·...·(2n-1)! / (2!·3!·4!·...·(n-1)!)²·n!

But that's not a huge improvement
dannykodicek.bsky.social
Yes, that's what I have - the product from 1 to n of (2n-1) C n

I wondered if you had a clever way to collapse that product into a more compact formula. There's a nice way to visualise it as the product of successive central values from the even-numbered rows of Pascal's triangle
Reposted by Danny Kodicek (but, y'know, spooky)
gaius.bsky.social
Sad news everyone, I’m officially pulling the plug on Brightsiders, my super fan podcast for the 2017 movie Bright. I still feel like there were many interesting topics left to discuss but after 7 years of weekly episodes I’ve learned that no one has ever listened to the show.
dannykodicek.bsky.social
Hmm... it's easy to come up with a long expression for this, but I can't see a nice way to simplify it. Is there a neat answer?
dannykodicek.bsky.social
I had no idea! I used to have the audiobook of Tarka read by David Attenborough, listened to it many times as a kid. And yes, it was fucking brutal. Weird to learn there was a whole fascist ideology behind it
dannykodicek.bsky.social
Arguably Asimov's The Feeling of Power does have a similar theme - as we rely more and more on computers, the ability to manage without them becomes rare and precious.
dannykodicek.bsky.social
(And yes, it was a bit stereotypy and sexist, but even so, the black woman with the big 'fro was still an equal member of the team *and* portrayed as an object of desire)
dannykodicek.bsky.social
You know how the anti-woke brigade are always complaining about how "you couldn't make that today" about some bland racist shit? Imagine their reaction if a show like this one (from 1977) came out today.
publicbenjamin.bsky.social
Share a cartoon from the past that kids today probably never heard of
Space Sentinels
dannykodicek.bsky.social
I loved the animation for their teleportation device. And I remember finding Sentinel 1 (the big holographic head) quite spooky.
dannykodicek.bsky.social
We had a DVD with two episodes of this and my kids totally loved it.
Reposted by Danny Kodicek (but, y'know, spooky)
Reposted by Danny Kodicek (but, y'know, spooky)
thebossross.bsky.social
This conversation.

Thank you, #BBCWest / #BBCBristol - it's good to see you can still do it.
Reposted by Danny Kodicek (but, y'know, spooky)
jimmeruk.bsky.social
I really like what these guys are doing over the pond.
jimmer.art
Frogs together strong.
Inspired by events in Portland.
A drawing of three inflatable frogs, holding a sign saying ‘frogs together strong’.
Reposted by Danny Kodicek (but, y'know, spooky)
michaelehayden.bsky.social
“They are highly organized … [they] have purchased their own animal costumes”
Andy ngo mad about muppets again — this time in Chicago
dannykodicek.bsky.social
It feels like a beautiful debate from a more innocent time, when we all basically agreed racism was bad, and we were just arguing over the details.
dannykodicek.bsky.social
Just read a comment from someone saying they didn't like the ending of Lord of the Rings because they wanted it to end with a one-on-one showdown between Sauron and Gandalf, and I've never thought this about anyone before but I think maybe this person should just give up reading.
dannykodicek.bsky.social
I don't know what you're counting as "angles in polygons" type of reasoning and what you don't. You'd need to be pretty clear what theorems they are and aren't allowed to assume.
(I guess I'd start with "two adjacent right angles sum to 180 so the opposite sides are parallel")
Reposted by Danny Kodicek (but, y'know, spooky)
ryanhatesthis.bsky.social
In the 2010s, this country's elites were thrown onto social platforms with everyone else and could finally read what we all think about them and it caused them so much psychic damage that they decided to destroy both the internet and democracy to make sure nothing like it ever happened again.
gbbranstetter.bsky.social
If this is what it took for you to be pushed into fascism you were probably already there
This predates the social media wars of the late 2010s: One Trump appointee told me that a radicalizing experience was being booted out of the Gawker comments section, way back in the day. But as progressive movements swept through social media, others were tossed off Twitter and Facebook for stepping over a variety of lines, from allegations of harassment to claims of election misinformation. Pandemic era public health rules and fevered enforcement cost others their accounts.
dannykodicek.bsky.social
Me getting the precision scales out... "Hmm.. 69.4 grams. I guess this must be someone else's lost viola bow"
fernmonkey.bsky.social
My friend Sascha is a professional musician and he's lost a viola bow on the way to Heathrow. Please signal boost to help him get it back.
Lost viola bow on the way from Honor Oak Station to Heathrow Terminal 2. The bow slid from its bow case somewhere along the way, possibly on the train. TFL contacted already.
It weighs 68.2 grams and has got a stamped DODD next to the frog. If any info on this, please pm me.