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 A163918 #7 Mar 20 2022 21:42:17 %S A163918 0,1,4,2,11,6,7,3,8,5,9,13,18,17,12,24,10,15,16,22,21,28,37,29,48,47, %T A163918 58,38,23,30,39,31,73,85,72,61,71,70,83,59,84,97,112,98,60,50,49,40, %U A163918 14,26,20,19,25,32,41,33,52,42,62,51,27,34,43,35,260,237,238,216,215 %N A163918 Inverse permutation to A163917. %H A163918 A. Karttunen, <a href="/A163918/b163918.txt">Table of n, a(n) for n = 0..16383</a> %H A163918 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A163918 Inverse: A163917. a(n) = A054239(A163916(n)) = A163908(A163356(n)). See also A163358, A163908. %K A163918 nonn %O A163918 0,3 %A A163918 _Antti Karttunen_, Sep 19 2009