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 A297669 #8 Feb 16 2025 08:33:52 %S A297669 15,224,1815,28716,886837,46775584,4207536351 %N A297669 Number of chordless cycles in the n X n torus grid graph. %H A297669 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ChordlessCycle.html">Chordless Cycle</a> %H A297669 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TorusGridGraph.html">Torus Grid Graph</a> %Y A297669 Cf. A222199, A296527. %K A297669 nonn,more %O A297669 3,1 %A A297669 _Eric W. Weisstein_, Jan 02 2018 %E A297669 a(6)-a(9) from _Andrew Howroyd_, Jan 08 2018