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 A125979 #5 Mar 31 2012 13:21:12 %S A125979 0,1,3,2,8,5,6,7,4,22,13,15,18,10,19,11,20,21,12,14,16,17,9,64,36,41, %T A125979 50,27,52,29,55,59,32,38,43,46,24,60,33,39,47,25,61,34,62,63,35,40,48, %U A125979 49,26,51,28,53,56,30,54,57,58,31,37,42,44,45,23,196,106,120,148,78 %N A125979 Signature-permutation of a Catalan automorphism: composition of A125976 and A057164. %C A125979 This is self-inverse permutation (involution) of the nonnegative integers. %H A125979 <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations of Catalan automorphisms</a> %Y A125979 a(n) = A125976(A057164(n)) = A057164(A125976(n)). Differs from A071663 for the first time at n=43, where a(n)=34, while A071663(n)=48. %K A125979 nonn %O A125979 0,3 %A A125979 _Antti Karttunen_, Jan 02 2007