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 A128238 #17 Jun 24 2023 13:41:51 %S A128238 0,0,1,2,8,26,101,396,1744,8531,47803,308086,2300756,19909540, %T A128238 199365557 %N A128238 Number of n-node (unlabeled) graphs with girth 5. %o A128238 (nauty) geng -tfq $n | countg -qg5 --ng # _Martin Fuller_, May 03 2015 %Y A128238 Cf. A128041, A128042, A128236-A128243. %K A128238 nonn,more %O A128238 3,4 %A A128238 _Keith Briggs_, May 05 2007 %E A128238 Corrected and extended by _Martin Fuller_, May 01 2015