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 A234634 #11 Jun 15 2025 20:47:09 %S A234634 1,11,1033,1030304099,873851166316875626844153297, %T A234634 531723201747806346628696993678355296791302025810590916630277786972117723914960891 %N A234634 Numbers of undirected cycles in the n-Sierpinski gasket graph. %C A234634 Term a(7) has 243 decimal digits and a(8) has 727 decimal digits. - _Andrew Howroyd_, Jun 18 2017 %H A234634 Andrew Howroyd, <a href="/A234634/b234634.txt">Table of n, a(n) for n = 1..8</a> %H A234634 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>. %H A234634 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SierpinskiGasketGraph.html">Sierpinski Gasket Graph</a>. %Y A234634 Cf. A246957, A246958, A246959. %K A234634 nonn %O A234634 1,2 %A A234634 _Eric W. Weisstein_, Dec 28 2013 %E A234634 a(4)-a(6) from _Andrew Howroyd_, Jun 18 2017