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 A246166 #6 Aug 18 2014 00:53:52 %S A246166 1,2,4,3,8,6,5,16,12,10,7,9,32,24,20,14,11,18,15,64,48,40,13,28,22,36, %T A246166 30,21,17,27,25,128,96,26,19,80,56,44,72,60,23,42,34,33,54,50,35,256, %U A246166 45,192,29,38,52,160,112,88,144,39,31,120,46,84,68,66,108,100,37,70,55,49,512,63,51,90,58,384,41 %N A246166 Inverse permutation to sequence A246165. %H A246166 Antti Karttunen, <a href="/A246166/b246166.txt">Table of n, a(n) for n = 1..1228</a> %H A246166 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A246166 (Scheme, requiring also defineperm1-macro from _Antti Karttunen_'s IntSeq-library) %o A246166 ;; When A246165 is defined with defineperm1-macro, it will automatically cache also the inverse values, which are then available with negative arguments. Values of A246165 have to be computed first, for up to some value, before this can be used: %o A246166 (define (A246166 n) (A246165 (- n))) %Y A246166 Inverse: A246165. %Y A246166 Similar permutations: A119436, A126918. %K A246166 nonn %O A246166 1,2 %A A246166 _Antti Karttunen_, Aug 17 2014