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 A330311 #12 Dec 11 2019 12:27:28 %S A330311 1,3,2,5,4,9,13,12,45,40,7,56,18,11,14,15,10,19,6,44,43,8,55,17,28,21, %T A330311 16,25,20,29,63,42,23,175,34,27,22,31,26,35,30,80,75,24,39,33,48,37, %U A330311 32,49,36,85,79,76,46,187,130,47,38,51,50,89,84,110,109 %N A330311 Where n appears in A329544, or -1 if n never appears. %C A330311 a(919) is unknown. If it is not -1, it is greater than 10^6 (see A329544). %H A330311 N. J. A. Sloane, <a href="/A330311/b330311.txt">Table of n, a(n) for n = 1..918</a> %F A330311 a(A104444(n)) = -1. - _Rémy Sigrist_, Dec 11 2019 %Y A330311 Cf. A104444, A329544, A329797, A328798. %K A330311 nonn %O A330311 1,2 %A A330311 _N. J. A. Sloane_, Dec 10 2019