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 A345464 #12 Jun 30 2021 02:21:25 %S A345464 1,1,6,38,232,1607,12984,117513,1182540,13060248,157314056,2051314949 %N A345464 Second column of A345461 - Number of distinct permutations after one step of the "optimist" sorting algorithm. %Y A345464 Cf. A345453, A345461. %Y A345464 Cf. A000166 (equivalent for Eulerian numbers). %Y A345464 Cf. A180191 (equivalent for Stirling numbers of the first kind). %K A345464 nonn,more %O A345464 2,3 %A A345464 _Olivier Gérard_, Jun 20 2021 %E A345464 a(11)-a(13) from _Pontus von Brömssen_, Jun 29 2021