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 A363163 #17 Aug 05 2023 22:32:43 %S A363163 1,1,5,17,83,394,2278,13949,93898,670003,5059914,40033149,330555726, %T A363163 2836763749,25233047351,232080785282,2202802051834,21539083861802, %U A363163 216638327167235,2238260395921444,23725940481578999 %N A363163 Number of directed multigraphs without loops containing n edges and an infinite number of vertices modulo isomorphism and reversal of all edge directions. %Y A363163 Cf. A364088 (with loops). %K A363163 nonn %O A363163 0,3 %A A363163 _Saibal Mitra_, Jul 07 2023