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 A243417 #4 Jun 04 2014 18:13:22 %S A243417 1,13,109,748,4531,25228,132515,667747,3263146,15576803,72995158, %T A243417 336986263,1536565549,6933515253,31007787862,137599702886, %U A243417 606467289880,2656919897648,11577389890752,50204031478108,216750954307831,932068704988570,3993428974519241 %N A243417 Number of Dyck paths of semilength n having exactly 5 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)). %H A243417 Alois P. Heinz, <a href="/A243417/b243417.txt">Table of n, a(n) for n = 12..550</a> %Y A243417 Column k=5 of A243366. %K A243417 nonn %O A243417 12,2 %A A243417 _Alois P. Heinz_, Jun 04 2014