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 A308301 #11 May 22 2019 22:13:04 %S A308301 1,2,3,4,7,5,8,6,13,9,15,11,16,14,25,10,31,19,32,12,24,17,63,21,57,30, %T A308301 29,18,64,23,127,22,49,33,56,27,128,62,48,20,255,40,256,28,39,65,511, %U A308301 26,120,55,61,34,512,35,113,46,96,126,1023,41,1024,129,51,42 %N A308301 Inverse permutation to A109852. %H A308301 Charlie Neder, <a href="/A308301/b308301.txt">Table of n, a(n) for n = 1..1000</a> %H A308301 Rémy Sigrist, <a href="/A308301/a308301.gp.txt">PARI program for A308301</a> %H A308301 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A308301 A109852(1023) = 59, hence a(59) = 1023. %o A308301 (PARI) See Links section. %Y A308301 Cf. A109852. %K A308301 nonn %O A308301 1,2 %A A308301 _Rémy Sigrist_, May 19 2019