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 A360472 #11 Feb 12 2023 10:05:42 %S A360472 1,4,7,10,13,16,19,22,25,28,2,5,8,11,14,17,20,23,26,48,3,49,51,53,55, %T A360472 57,59,61,63,116,6,50,117,119,121,123,125,127,129,201,9,52,118,202, %U A360472 204,206,208,210,212,312,12,54,120,203,313,315,317,319,321,421,15 %N A360472 Inverse permutation to A360470. %H A360472 Rémy Sigrist, <a href="/A360472/b360472.txt">Table of n, a(n) for n = 1..10000</a> %H A360472 Rémy Sigrist, <a href="/A360472/a360472.gp.txt">PARI program</a> %H A360472 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A360472 A360470(42) = 117, so a(117) = 42. %o A360472 (PARI) See Links section. %Y A360472 Cf. A360470. %K A360472 nonn,base,look %O A360472 1,2 %A A360472 _Rémy Sigrist_, Feb 08 2023