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 A069766 #5 May 01 2014 02:46:54 %S A069766 0,1,2,3,5,4,6,7,11,9,10,8,12,17,14,21,19,13,20,16,18,15,22,23,37,29, %T A069766 33,27,41,25,39,31,32,26,40,35,36,24,38,30,34,28,42,57,47,72,64,44,68, %U A069766 54,61,51,76,59,49,74,66,43,67,53,60,50,75,70,46,71,56,58,48,73,63,65 %N A069766 Self-inverse permutation of natural numbers induced by the automorphism RotateHandshakes180 (A069771) or xReflectHandshakes (A069772) acting on the symmetric parenthesizations encoded by A061855. %H A069766 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A069766 Cf. A061855, A069771, A069772. %K A069766 nonn %O A069766 0,3 %A A069766 _Antti Karttunen_, Apr 16 2002