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 A361251 #40 Mar 20 2025 22:32:31 %S A361251 1,2,3,4,6,5,7,10,8,9,11,12,15,16,13,14,21,17,22,18,23,28,29,19,24,20, %T A361251 30,36,37,31,45,25,38,27,39,46,55,56,26,32,66,47,67,35,48,78,79,40,91, %U A361251 58,34,33,92,57,69,44,68,105,106,80,120,54,93,49,41,43 %N A361251 Inverse permutation to A360371. %H A361251 Rémy Sigrist, <a href="/A361251/b361251.txt">Table of n, a(n) for n = 1..10000</a> %H A361251 Rémy Sigrist, <a href="/A361251/a361251.gp.txt">PARI program</a> %H A361251 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A361251 A360371(42) = 68, so a(68) = 42. %o A361251 (PARI) \\ See Links section. %Y A361251 Cf. A360371. %K A361251 nonn %O A361251 1,2 %A A361251 _Rémy Sigrist_, Mar 30 2023