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 A350730 #8 Jan 16 2022 17:46:03 %S A350730 1,0,2,66,7998,2895570,3015624078,8890966977354,74079608267459142, %T A350730 1754419666770364130730,119163820122708911990211222, %U A350730 23431180614718394105521543222866,13448652672256961901980839022683943838,22684139279519345808802725789494254587951810 %N A350730 Number of strongly connected oriented graphs on n labeled nodes. %H A350730 Andrew Howroyd, <a href="/A350730/b350730.txt">Table of n, a(n) for n = 1..50</a> %o A350730 (PARI) StrongO(14) \\ See A350731 for program code. %Y A350730 The unlabeled version is A350489. %Y A350730 Row sums of A350731. %Y A350730 Cf. A003030, A054941. %K A350730 nonn %O A350730 1,3 %A A350730 _Andrew Howroyd_, Jan 11 2022