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 A303766 #11 Mar 22 2022 00:12:17 %S A303766 0,1,3,2,5,6,18,4,8,9,11,10,28,29,39,7,13,14,16,15,54,55,88,17,70,71, %T A303766 73,72,128,129,420,12,20,21,23,22,25,26,156,24,110,111,113,112,178, %U A303766 179,209,27,151,152,154,153,274,275,822,155,384,385,387,386,1943,1944,4580,19,31,32,34,33,36,37,252,35,242,243,245,244,316,317,497,38,247 %N A303766 Inverse permutation to A303765. %H A303766 Antti Karttunen, <a href="/A303766/b303766.txt">Table of n, a(n) for n = 0..189</a> %H A303766 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A303766 For n >= 0, a(A000225(n)) = A300829(n). %o A303766 (PARI) \\ See A303765. %Y A303766 Cf. A303765 (inverse). %Y A303766 Cf. A300829, A303761. %K A303766 nonn %O A303766 0,3 %A A303766 _Antti Karttunen_, May 02 2018