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 A222305 #13 Jul 09 2025 04:35:54
%S A222305 0,1,3,6,7,8,13,14,21,24,27,31,38,39,43,48,52,56,57,64,73,78,81,84,91,
%T A222305 95,104,105,111,112,125,133,134,147,148,155,157,162,168,183,186,189,
%U A222305 192,195,206,211,216,237,241,244,245,248,258,259,273,291,294,301,304,305,307,312,343,344,351,372,375,378,381,384
%N A222305 Numbers k such that 9k is in A045980.
%C A222305 The sequence "numbers k such that 3k is in A045980" consists of these numbers multiplied by 3.
%H A222305 Charles R Greathouse IV, <a href="/A222305/b222305.txt">Table of n, a(n) for n = 1..10000</a>
%o A222305 (PARI) T=thueinit('z^3+1);is(n)=n==0 || #thue(T, 9*n)>0 \\ _Charles R Greathouse IV_, Nov 29 2014
%Y A222305 Cf. A045980, A222304, A222306.
%K A222305 nonn
%O A222305 1,3
%A A222305 _N. J. A. Sloane_, Feb 15 2013, based on a suggestion from _Allan C. Wechsler_