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 A319024 #10 Sep 09 2018 12:42:04 %S A319024 1,2,3,4,5,8,9,7,6,10,14,15,21,13,33,12,22,23,20,19,32,31,34,30,46,66, %T A319024 11,35,16,24,25,18,39,29,47,37,54,45,36,50,65,69,48,89,49,67,38,68,53, %U A319024 72,73,95,96,51,52,91,70,92,71,126,94,129,93,28,90,44,125 %N A319024 Inverse permutation to A319023. %H A319024 Rémy Sigrist, <a href="/A319024/b319024.txt">Table of n, a(n) for n = 1..2500</a> %H A319024 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A319024 A319023(69) = 42, hence a(42) = 69. %Y A319024 Cf. A319023. %K A319024 nonn,base %O A319024 1,2 %A A319024 _Rémy Sigrist_, Sep 08 2018