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 A300553 #11 Feb 16 2025 08:33:53 %S A300553 0,4,12,36,56,120,135,250,297,684,520,910,945,1616,1428,2826,2489, %T A300553 3500,3654,5346,4899,9000,7175,10010,9909,14028,13050,21960,17577, %U A300553 23552,21582,28798,28385,38952,36778,47044,43992,57680,51455,77238,66865,81576 %N A300553 Number of 5-cycles in the n-polygon diagonal intersection graph. %H A300553 Andrew Howroyd, <a href="/A300553/b300553.txt">Table of n, a(n) for n = 3..100</a> %H A300553 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a> %H A300553 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PolygonDiagonalIntersectionGraph.html">Polygon Diagonal Intersection Graph</a> %Y A300553 A062361 (3-cycles), A300552 (4-cycles), A300554 (6-cycles). %K A300553 nonn %O A300553 3,2 %A A300553 _Eric W. Weisstein_, Mar 08 2018 %E A300553 Terms a(21) and beyond from _Andrew Howroyd_, Mar 11 2018