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 A286556 #5 May 13 2017 17:20:31 %S A286556 0,1,3,2,7,6,15,5,4,14,31,13,63,30,12,10,127,9,255,29,11,62,511,26,8, %T A286556 126,28,61,1023,25,2047,21,27,254,24,18,4095,510,60,58,8191,22,16383, %U A286556 125,20,1022,32767,53,16,17,19,253,65535,57,23,122,59,2046,131071,50,262143,4094,124,42,56,54,524287,509,52,49,1048575,37 %N A286556 Permutation of nonnegative integers: a(n) = A006068(A252754(n)). %C A286556 Note the indexing: the domain starts from one, but the range includes also zero. %H A286556 Antti Karttunen, <a href="/A286556/b286556.txt">Table of n, a(n) for n = 1..1024</a> %H A286556 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A286556 a(n) = A006068(A252754(n)). %o A286556 (Scheme) (define (A286556 n) (A006068 (A252754 n))) %Y A286556 Inverse: A286555. %Y A286556 Cf. A006068, A252754. %Y A286556 Differs from similarly constructed A243354 for the first time at n=21, where a(21) = 11, while A243354(21) = 28. %K A286556 nonn %O A286556 1,3 %A A286556 _Antti Karttunen_, May 13 2017