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 A333162 #7 Mar 13 2020 02:50:54 %S A333162 1,2,4,6,11,16,38,78,304,1672,19630,450154,20198620,1673850034, %T A333162 252574719718,69216356716672,34559361669877526,31561018687380681802, %U A333162 52958472442027295300520,163901411216705405946164728,939523329928455089556983977702 %N A333162 Number of regular graphs on n unlabeled nodes with half-edges. %C A333162 A half-edge is like a loop except it only adds 1 to the degree of its vertex. %Y A333162 Row sums of A333161. %Y A333162 Cf. A322698, A333159. %K A333162 nonn %O A333162 0,2 %A A333162 _Andrew Howroyd_, Mar 11 2020