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 A332166 #15 Nov 22 2020 04:28:37 %S A332166 0,1,2,3,4,5,6,7,8,9,10,11,13,16,20,25,31,38,46,55,12,14,17,21,26,32, %T A332166 39,47,56,64,15,18,22,27,33,40,48,57,65,72,19,23,28,34,41,49,58,66,73, %U A332166 79,24,29,35,42,50,59,67,74,80,85,30,36,43,51,60,68,75,81 %N A332166 Inverse permutation to A332144. %H A332166 Rémy Sigrist, <a href="/A332166/b332166.txt">Table of n, a(n) for n = 0..9999</a> %H A332166 Rémy Sigrist, <a href="/A332166/a332166.gp.txt">PARI program for A332166</a> %H A332166 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A332166 a(10^k - 1) = 10^k - 1 for any k >= 0. %F A332166 a(10^k) = 10^k for any k >= 0. %F A332166 a(10^k + 1) = 10^k + 1 for any k >= 0. %e A332166 A332144(28) = 42, so a(42) = 28. %o A332166 (PARI) See Links section. %Y A332166 Cf. A332144. %K A332166 nonn,base %O A332166 0,3 %A A332166 _Rémy Sigrist_, Nov 20 2020