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 A230599 #8 Nov 04 2013 03:32:45 %S A230599 1,3,2,5,6,4,7,12,8,10,9,13,14,11,15,27,16,18,17,20,21,19,22,28,23,25, %T A230599 24,29,30,26,31,58,32,34,33,36,37,35,38,43,39,41,40,44,45,42,46,59,47, %U A230599 49,48,51,52,50,53,60,54,56,55,61,62,57,63,121,64,66,65 %N A230599 Inverse permutation to A230598. %C A230599 a(A230598(n)) = A230598(a(n)) = n, for any n>0. %H A230599 Paul Tek, <a href="/A230599/b230599.txt">Table of n, a(n) for n = 1..10000</a> %H A230599 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A230599 Cf. A230598. %K A230599 nonn,base %O A230599 1,2 %A A230599 _Paul Tek_, Oct 24 2013