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 A091263 #15 Apr 23 2019 01:56:38 %S A091263 1,2,4,7,11,5,13,20,10,22,8,24,3,26,40,23,42,19,44,17,46,15,48,12,50, %T A091263 6,52,79,49,81,45,83,41,85,38,87,36,89,34,91,32,93,30,95,28,97,25,99, %U A091263 18,101,14,103,155,100,157,96,159,92,161,88,163,84,165,80,167,77,169,75 %N A091263 Inverse permutation to A091023. %C A091263 Let S_n be the set of all positive integers except a(1), a(2), ..., a(n-1) and a(n). Let k_n be the number of members of S_n that are less than a(n). (k_n = A091068(n+1).) If k_n >= n, then a(n+1) is the (1+k_n-n)th member of S_n; if k_n < n then a(n+1) is the (k_n+n)th member of S_n. - _David Wasserman_, Feb 23 2006 %H A091263 Charlie Neder, <a href="/A091263/b091263.txt">Table of n, a(n) for n = 1..1000</a> %K A091263 nonn,easy %O A091263 1,2 %A A091263 _N. J. A. Sloane_, following a suggestion of _Leroy Quet_, Feb 23 2004 %E A091263 More terms from _John W. Layman_, Feb 25 2004