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 A213813 #31 Jul 02 2025 09:36:01 %S A213813 0,1,32,9770,205832,32463802,966656134,102283239429,3913787773536, %T A213813 328076475659033,14746957510647992,1076226888605605706, %U A213813 53540340738182687296,3593066312119675283778,190433654636776931262392,12142048779807437697982030,669350612142203868221516908 %N A213813 Number of Hamiltonian cycles in P_12 X P_n. %H A213813 Huaide Cheng, <a href="/A213813/b213813.txt">Table of n, a(n) for n = 1..567</a> (terms 1..100 from Anand Krishnamoorthi) %H A213813 Anand Krishnamoorthi, <a href="/A213813/a213813.cc.txt">C++ program</a>. %Y A213813 Row/column 12 of A321172. %Y A213813 Cf. A180505 %K A213813 nonn %O A213813 1,3 %A A213813 _Anand Krishnamoorthi_, Jun 20 2012