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 A193154 #11 Feb 16 2025 08:33:15 %S A193154 1,3,384,2048000,518400000000,7192939211224252416, %T A193154 6266608900058816862941609984,388040545518272905743826242144898646016, %U A193154 1911283738799704422875920401026220178381209600000000 %N A193154 Numbers of spanning trees of the triangular graphs. %C A193154 Triangular graphs are defined for n>=2. %H A193154 Alois P. Heinz, <a href="/A193154/b193154.txt">Table of n, a(n) for n = 2..20</a> %H A193154 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SpanningTree.html">Spanning Tree</a> %H A193154 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TriangularGraph.html">Triangular Graph</a> %K A193154 nonn %O A193154 2,2 %A A193154 _Eric W. Weisstein_, Jul 16 2011