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 A250476 #7 Dec 18 2014 02:04:47 %S A250476 1,2,3,4,5,6,7,8,14,9,10,21,11,12,13,15,33,16,25,17,18,32,19,20,22,39, %T A250476 23,24,36,26,50,43,27,28,29,30,31,34,55,56,46,92,35,37,68,38,40,59,58, %U A250476 41,42,70,44,86,45,47,78,48,144,49,51,77,66,52,53,54,57,91,81,80,60,88,109,87,61,62,63,64,99,65,67,226,105,69,101,71,121,72,111,73,74 %N A250476 Permutation of natural numbers: a(n) = A249826(A249823(n)). %H A250476 Antti Karttunen, <a href="/A250476/b250476.txt">Table of n, a(n) for n = 1..10000</a> %H A250476 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A250476 a(n) = A249826(A249823(n)). %o A250476 (Scheme) (define (A250476 n) (A249826 (A249823 n))) %Y A250476 Inverse: A250475. %Y A250476 Row 3 of A251722. %Y A250476 Cf. A249823, A249826. %K A250476 nonn %O A250476 1,2 %A A250476 _Antti Karttunen_, Dec 07 2014