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 A361586 #8 Mar 29 2023 14:39:29 %S A361586 1,0,1,5,90,5289,1071691,712342075,1585944117738,12152982231404393, %T A361586 328276896613548366675,31834464336872565979301363, %U A361586 11234630426387288679040317490771,14576388456695908232721134339830232699,70075904005979773819582865772534172929477101 %N A361586 Number of digraphs on n unlabeled nodes in which every node belongs to a directed cycle. %o A361586 (PARI) A361586seq(16) \\ See PARI link in A350794 for program code. %Y A361586 Column k=0 of A361590. %Y A361586 The labeled version is A086366. %Y A361586 Cf. A350794. %K A361586 nonn %O A361586 0,4 %A A361586 _Andrew Howroyd_, Mar 16 2023