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 A102452 #6 Mar 30 2012 18:50:48 %S A102452 1,2,3,4,5,6,7,8,9,10,11,12,13,15,16,14,17,18,19,22,23,20,21,24,25,26, %T A102452 27,28,29,32,30,31,36,37,33,34,35,40,41,38,39,47,46,43,42,44,45,48,49, %U A102452 52,53,50,51,58,59,54,55,56,57,64,63,61,60,62,71,67,73,65,66,68,72,69 %N A102452 A102450(A102450(n)). %C A102452 Permutation of the positive integers with inverse A102450. %H A102452 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A102452 Cf. A100806. %K A102452 nonn %O A102452 1,2 %A A102452 _Reinhard Zumkeller_, Jan 09 2005