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 A363536 #4 Jul 15 2023 06:35:52 %S A363536 1,-1,3,24,38,17,142,248,7,328,528,67,446,1676,31,208,1828,25,656,788, %T A363536 203,4700,1678,47,5368,1270,87,2992,10712,317,12034,9262,121,5248, %U A363536 11744,61,2798,19598,481,3628,8956,181,4388,18694,383,22754,23836,43,8212,34636 %N A363536 a(n) is the smallest k such that A363533(k) = n, or -1 if no such k exists. %Y A363536 Cf. A361999, A363533. %K A363536 sign %O A363536 1,3 %A A363536 _Pontus von Brömssen_, Jun 09 2023