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 A073193 #3 Oct 15 2015 10:55:22 %S A073193 1,1,2,4,11,30,93,292,965,3238,11126,38708,136486,485820,1744677, %T A073193 6310584,22973793,84103302,309429066,1143487428,4242631626, %U A073193 15798011604,59018856522,221143860936,830895360978,3129747395548,11816242209260 %N A073193 Number of separate orbits/cycles to which the Catalan bijection A057508 partitions each A000108(n) structures encoded in the range [A014137(n-1)..A014138(n-1)] of the sequence A014486/A063171. %F A073193 a(n) = (A000108(n)+A073192(n))/2 %Y A073193 Occurs for first time in A073201 as row 168. %K A073193 nonn %O A073193 0,3 %A A073193 _Antti Karttunen_, Jun 25 2002