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 A380623 #7 Jan 29 2025 16:35:29 %S A380623 1,189,869400,16482741030,811815704093520,82428779884228798041, %T A380623 14987637044586056537983800,4438122232105976899960948809420, %U A380623 1998996880327869592350459728071408800,1300772228637464354810371940980750446850116,1174611244368635468934806695142536970482225836000 %N A380623 Number of rooted 5-regular combinatorial maps with 2n vertices. %C A380623 There are no 5-regular combinatorial maps with an odd number of vertices. %H A380623 Andrew Howroyd, <a href="/A380623/b380623.txt">Table of n, a(n) for n = 0..100</a> %Y A380623 With interspersed zeros column 5 of A380622. %K A380623 nonn %O A380623 0,2 %A A380623 _Andrew Howroyd_, Jan 29 2025