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 A166276 #7 Mar 20 2022 21:42:35 %S A166276 1,2,3,4,5,9,6,7,8,14,10,23,16,25,11,12,13,21,15,34,24,36,17,53,38,55, %T A166276 27,79,40,58,18,19,20,32,22,49,35,51,26,75,54,77,39,109,57,81,28,113, %U A166276 83,115,60,159,85,118,42,219,120,164,62,223,88,123,29,30,31,47,33,71 %N A166276 Inverse permutation to A161924. %H A166276 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A166276 Inverse: A161924. Cf. A166277. %K A166276 nonn %O A166276 1,2 %A A166276 _Antti Karttunen_, Oct 12 2009