A350958 - OEIS

%I #7 Feb 05 2022 23:32:10

%S 1,18,33,39,48,60,63,72,78,81,93,102,105,108,111,138,144,150,153,162,

%T 164,165,168,171,183,186,189,198,204,207,213,219,228,237,243,249,258,

%U 264,267,270,273,276,281,288,291,303,306,312,315,318,333,336,345,348,354,357

%N Positive numbers k such that 2k cannot be written as 3^i (i >= 0) plus a prime.

%C A058517 halved.

%Y Cf. A006285, A058517, A350628-A350630, A350957.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Feb 05 2022