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 A181227 #5 Jul 22 2025 08:37:18 %S A181227 0,0,0,0,0,26,702,11734,156976,1847636,20046784,205891684,2034977036, %T A181227 19567350334,184421027812,1712803733352,15736451922346, %U A181227 143435108141199,1299841823088167,11730670902611152,105559108929460026 %N A181227 Number of length n sequences p(i=0..n-1) with 0<=p(i)<=i and having exactly 3 maxima. %C A181227 Column 3 of A181229 %H A181227 R. H. Hardin, <a href="/A181227/b181227.txt">Table of n, a(n) for n=1..200</a> %K A181227 nonn %O A181227 1,6 %A A181227 _R. H. Hardin_ Oct 10 2010