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 A261294 #6 Aug 15 2015 03:35:20 %S A261294 0,1,2,3,4,5,6,7,8,9,10,11,21,25,29,12,37,41,45,49,13,15,51,65,69,14, %T A261294 52,81,85,89,16,17,32,91,109,18,56,92,125,129,20,19,59,35,131,22,58, %U A261294 96,132,169,24,23,61,72,38,171,62,100,136,172,28,27,63,103 %N A261294 a(n) = A065650(A065650(n)). %C A261294 Permutation of the nonnegatve integers with inverse A261293; %C A261294 a(A065649(n)) = A065649(a(n)) = A065650(n). %H A261294 Reinhard Zumkeller, <a href="/A261294/b261294.txt">Table of n, a(n) for n = 0..10000</a> %H A261294 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A261294 (Haskell) %o A261294 a261294 = a065650 . a065650 %Y A261294 Cf. A065650, A065649, A261293 (inverse), A261279 (fixed points). %K A261294 nonn,look %O A261294 0,3 %A A261294 _Reinhard Zumkeller_, Aug 14 2015