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 A181228 #7 Aug 05 2025 12:24:37 %S A181228 0,0,0,0,0,0,0,476,20956,541960,10783530,183084580,2796467584, %T A181228 39641212284,532014841490,6852097042820,85509456576162, %U A181228 1041222110654522,12436416067831144,146290172122139436,1700035652369320714 %N A181228 Number of length n sequences p(i=0..n-1) with 0<=p(i)<=i and having exactly 4 maxima. %C A181228 Column 4 of A181229. %H A181228 R. H. Hardin, <a href="/A181228/b181228.txt">Table of n, a(n) for n=1..200</a> %Y A181228 Cf. A181229. %K A181228 nonn %O A181228 1,8 %A A181228 _R. H. Hardin_, Oct 10 2010