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 A275842 #7 Aug 13 2016 11:09:05 %S A275842 0,5,1,3,41,23,13,14,11,17,29,8,2,9,7,21,4,15,104,35,231,52,209,285, %T A275842 85,86,50,127,51,54,105,431,197,42,182,172,26,177,76,125,100,225,161, %U A275842 62,134,37,153,30,80,183,81,341,38,25,31,75,165,71,18,119,59,269,56,141,99,137,107,111,213,95,12,43,6,57,32,33,19,20,22,129,83,87,53,55,16,101 %N A275842 Permutation of nonnegative integers: a(n) = A273663(A275838(A273670(n))). %H A275842 Antti Karttunen, <a href="/A275842/b275842.txt">Table of n, a(n) for n = 0..4000</a> %H A275842 <a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a> %H A275842 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A275842 a(n) = A273663(A275838(A273670(n))). %o A275842 (Scheme) (define (A275842 n) (A273663 (A275838 (A273670 n)))) %Y A275842 Inverse: A275841. %Y A275842 Cf. A273663, A273670, A275838. %K A275842 nonn,base %O A275842 0,2 %A A275842 _Antti Karttunen_, Aug 13 2016