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 A064208 #5 Oct 12 2013 15:16:36 %S A064208 3,7,8,1,2,0,4,9,5,12,6,17,10,15,11,13,18,14,16,21,26,19,24,20,22,27, %T A064208 23,25,30,35,28,33,29,31,36,32,34,39,45,37,42,38,40,50,41,43,48,44,46, %U A064208 51,47,49,54,59,52,57,53,55,60,56,58 %N A064208 Inverse of sequence A004486 considered as a permutation of the nonnegative integers. %C A064208 Since A004486 is arithmetically periodic, this should be too. This is a permutation of the nonnegative integers. %H A064208 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A064208 Cf. A004486. %K A064208 easy,nonn %O A064208 0,1 %A A064208 _Howard A. Landman_, Sep 21 2001