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 A368578 #9 Jan 03 2024 12:00:20 %S A368578 0,1,2,3,4,5,6,8,7,9,10,12,13,15,17,20,11,14,16,18,19,21,23,26,24,27, %T A368578 30,34,35,38,43,48,22,25,28,31,32,36,39,44,40,45,49,54,55,61,68,76,50, %U A368578 56,62,69,70,77,84,93,85,94,103,113,114,124,135,146,29,33 %N A368578 Inverse permutation to A368577. %H A368578 Rémy Sigrist, <a href="/A368578/b368578.txt">Table of n, a(n) for n = 0..10000</a> %H A368578 Rémy Sigrist, <a href="/A368578/a368578.gp.txt">PARI program</a> %H A368578 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A368578 A368577(42) = 68, so a(68) = 42. %o A368578 (PARI) See Links section. %Y A368578 Cf. A368577. %K A368578 nonn,base %O A368578 0,3 %A A368578 _Rémy Sigrist_, Dec 31 2023