mathstodon.xyz is one of the many independent Mastodon servers you can use to participate in the fediverse.
A Mastodon instance for maths people. We have LaTeX rendering in the web interface!

Server stats:

2.9K
active users

There's a study of "meanders"—think a river that starts in the southwest, crosses a road n times, then flows eastward. It's related to the stamp folding problem (the end stamps have to point "outward"...) The sequence begins 1, 1, 2, 3, 8... oeis.org/A005316

Dave Richeson

It turns out that the nth meander number is the number of circular labyrinths (of the specific type shown below) with n circular walking paths.