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 A088337 #6 Mar 30 2012 18:50:38 %S A088337 3,10,6,0,27,17,2,15,556,13,1,68,44,9,42,7,40,5,38,72,36,74,34,76,32, %T A088337 78,30,4,179,121,26,119,24,117,22,115,20,113,18,111,16,109,14,107,12, %U A088337 105,542,103,187,101,189,99,191,97,193,95,195,93,197,91,199,89,201,87 %N A088337 Self-inverse integer permutation induced by A088230. %C A088337 A088230(a(n))=A088230(n): all nonnegative numbers occur exactly twice in A088230, a(n) gives the position of the other occurrence of A088230(n). %H A088337 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A088337 nonn %O A088337 0,1 %A A088337 _Reinhard Zumkeller_, Nov 07 2003