A350630 Positive numbers k such that 2k cannot be written as 3^i (i >= 1) plus a prime.

1, 2, 9, 12, 18, 21, 24, 27, 30, 33, 36, 39, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 126, 129, 132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162, 164, 165, 168, 171, 174, 177, 180, 183, 186, 189, 192

Offset: 1

Author

N. J. A. Sloane, Feb 05 2022

Keywords

• nonn

Comments

A350629 divided by 2.

Crossrefs

Cf. A006285, A058517, A350628, A350629, A350957, A350958.