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 A360960 #9 Mar 01 2023 02:09:09 %S A360960 0,1,3,2,7,4,6,5,15,8,14,9,13,10,12,11,31,23,30,24,29,25,28,26,27,21, %T A360960 22,16,20,17,19,18,35,32,34,33,63,51,62,52,61,53,60,54,59,55,58,56,57, %U A360960 36,50,37,49,38,48,39,47,40,46,41,45,42,44,43,127,111,126 %N A360960 Inverse permutation to A360959. %H A360960 Rémy Sigrist, <a href="/A360960/b360960.txt">Table of n, a(n) for n = 0..8191</a> %H A360960 Rémy Sigrist, <a href="/A360960/a360960.gp.txt">PARI program</a> %H A360960 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A360960 a(n) < 2^k for any n < 2^k. %e A360960 A360959(42) = 61, so a(61) = 42. %o A360960 (PARI) See Links section. %Y A360960 Cf. A360959. %K A360960 nonn,base %O A360960 0,3 %A A360960 _Rémy Sigrist_, Feb 27 2023