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 A368240 #9 Dec 19 2023 12:52:05 %S A368240 0,1,2,3,4,5,6,9,7,8,10,11,12,13,14,15,22,16,17,23,26,27,30,18,19,24, %T A368240 20,21,25,28,29,31,32,33,36,34,35,37,38,39,40,41,42,57,43,44,58,65,66, %U A368240 73,45,46,59,47,48,60,67,68,74,77,78,85,79,80,86,89,90,93 %N A368240 Inverse permutation to A368239. %H A368240 Rémy Sigrist, <a href="/A368240/b368240.txt">Table of n, a(n) for n = 0..9841</a> %H A368240 Rémy Sigrist, <a href="/A368240/a368240.gp.txt">PARI program</a> %H A368240 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A368240 A368239(67) = 56, so a(56) = 67. %o A368240 (PARI) See Links section. %Y A368240 Cf. A368239. %K A368240 nonn,base %O A368240 0,3 %A A368240 _Rémy Sigrist_, Dec 18 2023