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 A082859 #6 Jan 12 2024 07:47:55 %S A082859 0,0,1,0,1,2,0,1,1,3,0,1,2,1,4,0,1,2,1,2,5,0,1,2,3,2,2,6,0,1,1,3,1,1, %T A082859 3,7,0,1,1,3,1,1,3,3,8,0,1,2,1,4,2,2,1,1,9,0,1,2,1,4,2,2,1,1,4,10,0,1, %U A082859 2,1,4,5,2,1,1,4,4,11,0,1,2,1,2,5,2,1,1,2,2,5,12,0,1,2,1,2,5,2,1,1,2,2,5,5,13,0,1,2,3,4,2,6,3,3,4,4,4,2,2,14 %N A082859 Lower triangular region of A082858. %H A082859 Antti Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/ACO1.htm">Alternative Catalan Orderings</a> (with the complete Scheme source) %o A082859 (Scheme-functions showing the essential idea. For the full source, follow the "Alternative Catalan Orderings" link.) %o A082859 (define (A082859 n) (A080300 (parenthesization->binexp (GCSB (binexp->parenthesization (A014486 (A003056 n))) (binexp->parenthesization (A014486 (A002262 n))))))) %Y A082859 Cf. A082861, A003056, A002262. %K A082859 nonn,tabl %O A082859 0,6 %A A082859 _Antti Karttunen_, May 06 2003