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 A102455 #6 Mar 30 2012 18:50:48 %S A102455 1,2,3,4,5,6,7,10,9,11,8,17,19,13,12,14,16,22,15,23,21,18,20,27,25,26, %T A102455 29,37,24,31,41,28,33,34,35,30,43,38,32,36,40,45,39,47,44,42,46,59,49, %U A102455 50,51,53,56,48,55,54,52,58,57,67,66,62,61,63,60,73,71,64,65,69,79,68 %N A102455 A102453(A102453(n)). %C A102455 Permutation of the positive integers with inverse A102453. %H A102455 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A102455 Cf. A101212. %K A102455 nonn %O A102455 1,2 %A A102455 _Reinhard Zumkeller_, Jan 09 2005