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 A130930 #5 Mar 31 2012 13:21:16 %S A130930 0,1,3,2,7,6,8,4,5,17,16,18,14,15,22,19,21,9,10,20,11,12,13,45,44,46, %T A130930 42,43,50,47,49,37,38,48,39,40,41,63,60,62,51,52,64,56,58,23,24,57,25, %U A130930 26,27,61,53,59,28,29,54,30,31,32,55,33,34,35,36,129,128,130,126,127 %N A130930 Signature permutation of a Catalan automorphism: row 13 of A130401. %C A130930 The signature-permutation of the Catalan automorphism which is derived from the 13th non-recursive Catalan automorphism *A089858 with recursion schema REDRONI (see A130401 for the definition). %H A130930 A. Karttunen, <a href="/A130930/b130930.txt">Table of n, a(n) for n = 0..2055</a> %H A130930 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130930 Inverse: A130929. %K A130930 nonn %O A130930 0,3 %A A130930 _Antti Karttunen_, Jun 11 2007