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 A243105 #11 Jan 12 2015 09:54:10 %S A243105 28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,298702188259102685572182,0,0,0,0, %T A243105 1343764184037862976125525799963820,0,0,0,0,0, %U A243105 899099147941632652542743156466630723477224554496,0,0,89963063825649646755150759614762027655562252125282 %N A243105 Number of permutations of [n] with exactly ten (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down. %H A243105 Alois P. Heinz, <a href="/A243105/b243105.txt">Table of n, a(n) for n = 15..130</a> %Y A243105 Column k=10 of A242783. %K A243105 nonn %O A243105 15,1 %A A243105 _Alois P. Heinz_, Aug 19 2014