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 A252767 #9 Feb 16 2025 08:33:24 %S A252767 1,12,1728,2558976,38720000000,6009209192448000, %T A252767 9588099190533549457408,157453155560517847607911907328, %U A252767 26625078176206788678765153788526329856,46372286996438096918321753795447236853760000000,831978266205905084594329918959468674594128586559010635776 %N A252767 Number of spanning trees in C_n X P_n. %H A252767 Alois P. Heinz, <a href="/A252767/b252767.txt">Table of n, a(n) for n = 1..44</a> %H A252767 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CycleGraph.html">Cycle Graph</a> %H A252767 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PathGraph.html">Path Graph</a> %H A252767 Wikipedia, <a href="https://en.wikipedia.org/wiki/Kirchhoff%27s_theorem">Kirchhoff's theorem</a> %Y A252767 Main diagonal of A173958. %K A252767 nonn %O A252767 1,2 %A A252767 _Alois P. Heinz_, Dec 21 2014