This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A334398 #19 Aug 29 2020 02:10:38 %S A334398 1,2,3,7,16,39,96,245,631,1642 %N A334398 Number of endless self-avoiding walks of length n for the square lattice up to rotation, reflection, and path reversal. %C A334398 a(n) > A334322(n)/16. %H A334398 Nathan Clisby, <a href="https://arxiv.org/abs/1302.2796">Endless self-avoiding walks</a>, arXiv:1302.2796 [cond-mat.stat-mech], 2013. %H A334398 Code Golf Stack Exchange, <a href="https://codegolf.stackexchange.com/a/203971/53884">Infinite Snake game</a> %e A334398 The a(4) = 7 step patterns of length 4 are %e A334398 ---->---->---->---->, ---->---->---->, ---->----> , %e A334398 | | %e A334398 v v----> %e A334398 ---->---->, ----> ^, ----> , and ----> . %e A334398 | | | | | %e A334398 v v----> v----> v %e A334398 | | | %e A334398 v v v----> %Y A334398 Cf. A334322. %K A334398 nonn,walk,more %O A334398 1,2 %A A334398 _Peter Kagey_ and _Arnauld Chevallier_, Apr 26 2020