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 A358813 #10 Feb 16 2025 08:34:04 %S A358813 8,5326848,205683135000,3771854305099776,53095647535975155240, %T A358813 665880333340217184000000,7871822605982542067643202616, %U A358813 89927963805390785392395474173952,1005049441217682470864686231147005000 %N A358813 Number of spanning trees in C_8 X C_n. %H A358813 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SpanningTree.html">Spanning Tree</a> %H A358813 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TorusGridGraph.html">Torus Grid Graph</a> %o A358813 (PARI) default(realprecision, 120); %o A358813 T(n, k) = round(n*k*prod(a=1, n-1, prod(b=1, k-1, 4*sin(a*Pi/n)^2+4*sin(b*Pi/k)^2))); %o A358813 a(n) = T(8, n); %Y A358813 Row 8 of A212796. %K A358813 nonn %O A358813 1,1 %A A358813 _Seiichi Manyama_, Dec 02 2022