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 A350752 #5 Jan 14 2022 19:45:59 %S A350752 1,0,1,1,3,6,25,91,442,2241,12591,75180,478648,3211245,22635956, %T A350752 166828221,1281518573,10229858290,84652925554,724601312400, %U A350752 6403522811765,58327076550161,546764617643250,5267719312771122,52096218005705959,528285485054771639 %N A350752 Number of unlabeled strongly connected digraphs with n arcs. %o A350752 (PARI) A350752seq(20) \\ See PARI link in A350489 for program code. %Y A350752 Row sums of A350753. %Y A350752 Column sums of A057276. %Y A350752 Cf. A035512, A350489, A350751. %K A350752 nonn %O A350752 0,5 %A A350752 _Andrew Howroyd_, Jan 13 2022