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 A382159 #17 Jul 09 2025 05:08:34 %S A382159 1,1,2,5,17,81,600,7182,142425,4664203,4071974770 %N A382159 Number of n-node acyclic digraphs, not necessarily connected, which are squares. %C A382159 For the definition of the square of a graph, see A382180. %Y A382159 Cf. A382180, A382157, A382158. %K A382159 nonn,more %O A382159 0,3 %A A382159 _N. J. A. Sloane_, Mar 24 2025, based on an email from _Brendan McKay_, Mar 18 2025