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 A222195 #12 Feb 17 2021 11:12:23
%S A222195 1,4,3,14,18,66,104,346,671,2086,4479,13523
%N A222195 Order of linear recurrence for number of Hamiltonian cycles in the graph P_n X P_{2k} (n odd) or P_n X P_k (n even), as a function of k.
%H A222195 Artem M. Karavaev, <a href="https://web.archive.org/web/20161024010518/http://flowproblem.ru/cycles/hamilton-cycles">Hamilton Cycles</a>
%Y A222195 Cf. A006864, A006865, A145401, A145416, A145418, A160149, A180504, A180505.
%K A222195 nonn,more
%O A222195 3,2
%A A222195 _N. J. A. Sloane_, Feb 14 2013