A222305 - OEIS

%I #8 Nov 29 2014 15:28:24

%S 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 95,104,105,111,112,125,133,134,147,148,155,157,162,168,183,186,189,

%U 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 Numbers n such that 9n is in A045980.

%C The sequence "numbers n such that 3n is in A045980" consists of these numbers multiplied by 3.

%H Charles R Greathouse IV, <a href="/A222305/b222305.txt">Table of n, a(n) for n = 1..10000</a>

%o (PARI) T=thueinit('z^3+1);is(n)=n==0 || #thue(T, 9*n)>0 \\ _Charles R Greathouse IV_, Nov 29 2014

%Y Cf. A045980, A222304, A222306.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Feb 15 2013, based on a suggestion from _Allan C. Wechsler_.