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 A057519 #3 May 01 2014 02:48:29 %S A057519 0,1,2,3,4,6,7,10,8,9,11,12,13,17,18,20,21,24,29,30,33,37,22,23,25,26, %T A057519 27,31,32,34,35,36,38,39,40,41,50,51,53,54,55,59,60,62,63,66,71,72,75, %U A057519 79,87,88,90,91,94,99,100,103,107,113,114,117,121,126,64,65,67,68,69 %N A057519 The local ranks of each term of A057517. %p A057519 a(n) = CatalanRank(floor(binwidth(A057517[n])/2), A057517[n]) %Y A057519 Cf. A057517, A057518. %K A057519 nonn %O A057519 1,3 %A A057519 _Antti Karttunen_, Sep 03 2000