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 A102450 #6 Mar 30 2012 18:50:48 %S A102450 1,2,3,4,5,6,7,8,9,10,11,12,13,16,14,15,17,18,19,22,23,20,21,24,25,26, %T A102450 27,28,29,31,32,30,35,36,37,33,34,40,41,38,39,45,44,46,47,43,42,48,49, %U A102450 52,53,50,51,56,57,58,59,54,55,63,62,64,61,60,68,69,66,70,72,73,65,71 %N A102450 A100806(A100806(n)). %C A102450 Permutation of the positive integers with inverse A102452. %H A102450 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A102450 nonn %O A102450 1,2 %A A102450 _Reinhard Zumkeller_, Jan 09 2005