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 A287154 #9 Feb 16 2025 08:33:46 %S A287154 0,1,2,4,7,14,26,49,97,186,379 %N A287154 Number of simple disconnected integral graphs on n vertices. %H A287154 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DisconnectedGraph.html">Disconnected Graph</a> %H A287154 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegralGraph.html">Integral Graph</a> %F A287154 a(n) = A077027(n) - A064731(n). %Y A287154 Cf. A077027 (number of simple not necessarily connected integral graphs). %Y A287154 Cf. A064731 (number of simple connected integral graphs). %K A287154 nonn,more %O A287154 1,3 %A A287154 _Eric W. Weisstein_, May 20 2017