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 A117332 #6 Mar 30 2012 18:50:54 %S A117332 1,2,3,4,5,6,8,7,9,10,12,13,14,15,16,11,17,18,20,21,22,23,24,25,26,27, %T A117332 29,30,31,32,34,35,36,37,38,39,40,41,42,43,33,19,28,44,46,47,48,49,50, %U A117332 51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,70,72,73,74,75 %N A117332 A095874(A117331(n)). %C A117332 Permutation of the natural numbers with inverse A117333. %H A117332 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A117332 nonn %O A117332 1,2 %A A117332 _Reinhard Zumkeller_, Mar 08 2006