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 A246227 #8 Jan 12 2015 09:48:23 %S A246227 171470,0,0,0,0,0,64556303422787162,0,0,0,0,0,53330837507335912360442, %T A246227 0,0,0,510289061406183066554328264,0,0,253410955069956058210029266688, %U A246227 0,3671524606283906345376361339863458448,41993835528908638694682902028400861 %N A246227 Number of permutations of [n] with exactly seven (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down. %H A246227 Alois P. Heinz, <a href="/A246227/b246227.txt">Table of n, a(n) for n = 15..130</a> %Y A246227 Column k=7 of A242783. %K A246227 nonn %O A246227 15,1 %A A246227 _Alois P. Heinz_, Aug 19 2014