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 A243250 #16 Feb 16 2025 08:33:22 %S A243250 0,0,0,2,10,73,688,10150,253396,11629559 %N A243250 Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a diamond graph. %H A243250 Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a> %H A243250 T. Hoppe and A. Petrone, <a href="http://arxiv.org/abs/1408.3644">Integer sequence discovery from small graphs</a>, arXiv preprint arXiv:1408.3644 [math.CO], 2014 %H A243250 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DiamondGraph.html">Diamond Graph</a> %F A243250 a(n) = A001349(n) - A242790(n). %K A243250 nonn,more %O A243250 1,4 %A A243250 _Travis Hoppe_ and _Anna Petrone_, Jun 01 2014