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 A382157 #12 Jul 09 2025 05:08:21 %S A382157 1,1,3,9,46,473,13763,1121383 %N A382157 Number of n-node digraphs without loops, not necessarily connected, which are squares. %C A382157 For the definition of the square of a graph, see A382180. %Y A382157 Cf. A382180. A382158, A382159. %K A382157 nonn,more %O A382157 0,3 %A A382157 _N. J. A. Sloane_, Mar 24 2025, based on an email from _Brendan McKay_, Mar 18 2025