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 A243419 #4 Jun 04 2014 18:04:35 %S A243419 1,17,184,1589,11802,78666,484163,2806039,15527186,82851064,429392845, %T A243419 2173167944,10783733773,52629404231,253233665755,1203597734972, %U A243419 5659518993517,26361150741197,121755788054172,558129404726455,2541096189931118,11497990460196322 %N A243419 Number of Dyck paths of semilength n having exactly 7 (possibly overlapping) occurrences of the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)). %H A243419 Alois P. Heinz, <a href="/A243419/b243419.txt">Table of n, a(n) for n = 16..550</a> %Y A243419 Column k=7 of A243366. %K A243419 nonn %O A243419 16,2 %A A243419 _Alois P. Heinz_, Jun 04 2014