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 A222065 #13 Jul 23 2025 23:12:17 %S A222065 2,12,2144,9277152,934520913216,2152453777211211412, %T A222065 112252999240982874562527216,131765033045251672652319572331061144, %U A222065 3467852755777932367855581588111341658695967892 %N A222065 a(n) = A143246(2n). %H A222065 Ed Wynn, <a href="http://arxiv.org/abs/1402.0545">Enumeration of nonisomorphic Hamiltonian cycles on square grid graphs</a>, arXiv preprint arXiv:1402.0545 [math.CO], 2014. %H A222065 <a href="/index/Gra#graphs">Index entries for sequences related to graphs, Hamiltonian</a> %Y A222065 Cf. A143246. %K A222065 nonn %O A222065 1,1 %A A222065 _N. J. A. Sloane_, Feb 08 2013