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 A072789 #2 May 01 2014 02:47:43 %S A072789 1,2,2,3,3,3,4,3,4,4,4,4,3,4,5,4,5,4,4,4,5,5,5,4,4,5,5,5,5,5,5,5,5,5, %T A072789 5,4,5,4,6,5,5,6,5,5,6,5,6,6,5,5,5,6,6,5,6,5,6,6,6,6,6,6,6,6,5,5,5,5, %U A072789 5,6,6,6,6,7,5,6,5,6,6,6,7,6,6,7,5,6,7,7,6,6,6,5,6,7,6,7,7,6,6,7,7,7,6,5,5 %N A072789 The size of the parenthesizations obtained with the global ranking/unranking scheme presented in A072787-A072788. %C A072789 To get a cleaner looking table, the term a(0)=0 is not listed here. %Y A072789 A072790(n) gives the maximum position where the value n occurs. See the comment at A072787. Same triangle computed modulo 2: A072792. %K A072789 nonn,tabl %O A072789 1,2 %A A072789 _Antti Karttunen_, Jun 12 2002