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 A125983 #5 Mar 31 2012 13:21:12 %S A125983 0,1,3,2,8,6,7,4,5,22,19,20,14,15,21,16,17,10,9,18,11,12,13,64,60,61, %T A125983 51,52,62,53,54,38,37,55,39,40,41,63,56,57,42,43,58,44,46,27,25,45,26, %U A125983 23,24,59,47,48,29,28,49,30,32,31,50,33,34,35,36,196,191,192,177,178 %N A125983 Signature-permutation of a Catalan automorphism: A057163-conjugate of A125981. %H A125983 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A125983 Inverse: A125984. a(n) = A057163(A125981(A057163(n))). %K A125983 nonn %O A125983 0,3 %A A125983 _Antti Karttunen_, Jan 02 2007