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 A166014 #7 Mar 19 2022 00:23:40 %S A166014 1,2,4,3,5,7,6,8,12,9,13,10,14,11,15,19,16,20,17,21,18,22,30,23,31,24, %T A166014 32,25,33,26,34,27,35,28,36,29,37,43,38,44,39,45,40,46,41,47,42,48,60, %U A166014 49,61,50,62,51,63,52,64,53,65,54,66,55,67,56,68,57,69,58,70,59,71,79 %N A166014 Inverse permutation to A138607. %H A166014 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A166014 Inverse: A138607. %K A166014 nonn %O A166014 1,2 %A A166014 _Antti Karttunen_, Oct 05 2009