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 A358057 #11 Oct 30 2022 15:09:04 %S A358057 1,2,3,9,4,5,6,8,7,10,18,11,12,15,13,17,14,16,35,24,19,20,21,23,22,25, %T A358057 30,26,27,32,28,34,29,31,65,33,40,36,37,39,38,48,41,46,42,43,44,47,45, %U A358057 61,49,55,50,51,52,54,53,56,130,57,58,62,59,64,60,67,63 %N A358057 Inverse permutation to A357961. %H A358057 Rémy Sigrist, <a href="/A358057/b358057.txt">Table of n, a(n) for n = 1..10000</a> %H A358057 Rémy Sigrist, <a href="/A358057/a358057.gp.txt">PARI program</a> %H A358057 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A358057 A357961(42) = 45, so a(45) = 42. %o A358057 (PARI) See Links section. %Y A358057 Cf. A357961. %K A358057 nonn,base %O A358057 1,2 %A A358057 _Rémy Sigrist_, Oct 28 2022