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 A361641 #9 Mar 19 2023 17:47:18 %S A361641 0,1,2,4,3,7,8,10,5,13,14,16,6,19,20,22,9,25,26,28,15,31,32,34,11,37, %T A361641 38,40,18,43,44,46,12,49,50,52,27,55,56,58,29,61,62,64,30,67,68,70,21, %U A361641 73,74,76,39,79,80,82,33,85,86,88,42,91,92,94,17,97,98 %N A361641 Inverse permutation to A361640. %H A361641 Rémy Sigrist, <a href="/A361641/b361641.txt">Table of n, a(n) for n = 0..8192</a> %H A361641 Rémy Sigrist, <a href="/A361641/a361641.gp.txt">PARI program</a> %H A361641 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A361641 A361640(42) = 60, so a(60) = 42. %o A361641 (PARI) See Links section. %Y A361641 Cf. A361640. %K A361641 nonn,base %O A361641 0,3 %A A361641 _Rémy Sigrist_, Mar 19 2023