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 A069769 #5 May 01 2014 02:46:54 %S A069769 0,1,2,3,4,5,7,6,8,9,10,11,12,13,17,18,16,14,15,21,20,19,22,23,24,25, %T A069769 26,27,28,29,30,31,32,33,34,35,36,45,46,48,49,50,44,47,42,37,38,43,39, %U A069769 40,41,58,59,57,54,55,56,53,51,52,63,62,61,60,64,65,66,67,68,69,70,71 %N A069769 Self-inverse permutation of natural numbers induced by the automorphism Rev1CarSide! acting on the parenthesizations encoded by A014486. %H A069769 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (Includes the complete Scheme program for computing this sequence) %H A069769 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A069769 The car/cdr-flipped conjugate of A057508, i.e. A069769(n) = A057163(A057508(A057163(n))). Cf. also A069787, A057161. %K A069769 nonn %O A069769 0,3 %A A069769 _Antti Karttunen_, Apr 16 2002