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 A181226 #5 Jul 22 2025 08:37:11 %S A181226 0,0,0,3,41,383,3073,22835,162517,1127399,7700835,52118506,350902046, %T A181226 2356532130,15813455692,106160717591,713555194577,4804401287757, %U A181226 32414156949765,219174260505645,1485378918978855,10089794073161037 %N A181226 Number of length n sequences p(i=0..n-1) with 0<=p(i)<=i and having exactly 2 maxima. %C A181226 Column 2 of A181229 %H A181226 R. H. Hardin, <a href="/A181226/b181226.txt">Table of n, a(n) for n=1..200</a> %K A181226 nonn %O A181226 1,4 %A A181226 _R. H. Hardin_ Oct 10 2010