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 A076434 #20 Apr 04 2025 15:14:31 %S A076434 0,0,0,0,0,2,4,16,21,168,544,18992,389451,50314864 %N A076434 Number of weakly regular simple graphs on n nodes. %H A076434 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/WeaklyRegularGraph.html">Weakly Regular Graph</a> %F A076434 a(n) = A005176(n) - A076435(n). - _Andrew Howroyd_, Sep 03 2019 %Y A076434 Cf. A005176 (regular simple graphs on n nodes). %Y A076434 Cf. A294405 (connected weakly regular graphs on n nodes). %Y A076434 Cf. A076435 (strongly regular simple graphs on n nodes). %K A076434 nonn,more %O A076434 1,6 %A A076434 _Eric W. Weisstein_, Oct 11 2002 %E A076434 a(10) from _Eric W. Weisstein_, Oct 30 2017 %E A076434 a(11)-a(14) from _Sean A. Irvine_, Apr 04 2025