A350958 Positive numbers k such that 2k cannot be written as 3^i (i >= 0) plus a prime.

1, 18, 33, 39, 48, 60, 63, 72, 78, 81, 93, 102, 105, 108, 111, 138, 144, 150, 153, 162, 164, 165, 168, 171, 183, 186, 189, 198, 204, 207, 213, 219, 228, 237, 243, 249, 258, 264, 267, 270, 273, 276, 281, 288, 291, 303, 306, 312, 315, 318, 333, 336, 345, 348, 354, 357

Offset: 1

Author

N. J. A. Sloane, Feb 05 2022

Keywords

• nonn

Comments

A058517 halved.

Crossrefs

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