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 A130928 #5 Mar 31 2012 13:21:16 %S A130928 0,1,3,2,7,8,5,6,4,20,17,22,18,21,13,12,15,19,16,11,14,9,10,54,61,46, %T A130928 57,45,63,59,49,48,55,64,50,62,58,35,36,32,34,31,41,40,52,56,60,43,47, %U A130928 53,44,33,30,39,51,42,28,37,23,24,29,38,25,26,27,180,158,192,157,187 %N A130928 Signature permutation of a Catalan automorphism: row 20 of A130401. %C A130928 The signature-permutation of the Catalan automorphism which is derived from the 20th non-recursive Catalan automorphism *A089862 with recursion schema REDRONI (see A130401 for the definition). %H A130928 A. Karttunen, <a href="/A130928/b130928.txt">Table of n, a(n) for n = 0..2055</a> %H A130928 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A130928 Inverse: A130927. %K A130928 nonn %O A130928 0,3 %A A130928 _Antti Karttunen_, Jun 11 2007