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 A126038 #5 Feb 11 2024 12:43:30 %S A126038 0,1,3,-1,2,15,-1,4,17,-1,14,6,-1,11,182,-1,16,8,-1,21,13,-1,5,145,-1, %T A126038 18,10,-1,181,23,-1,349,41,-1,7,147,-1,178,20,-1,12,346,-1,183,25,-1, %U A126038 144,56,-1,188,30,-1,9,149,-1,48,180,-1,22,317,-1,141,348,-1 %N A126038 Index where n first appears in A128333, or -1 if n never appears. %C A126038 Positive multiples of 3 never appear in A128333. Does every other number eventually appear there? %Y A126038 Cf. A128333. %K A126038 sign %O A126038 0,3 %A A126038 _Nick Hobson_, Feb 28 2007