A384918 If k is in the sequence, so is k*2^m + 3, for all m > 0, a(1) = 2, ordered.

2, 7, 11, 17, 19, 25, 31, 35, 37, 41, 47, 53, 59, 65, 67, 71, 73, 77, 79, 85, 91, 97, 103, 109, 115, 121, 127, 131, 133, 137, 139, 143, 145, 149, 151, 155, 157, 161, 167, 173, 179, 185, 191, 197, 203, 209, 215, 221, 227, 233, 239, 245, 251, 257, 259, 263

Offset: 1

Author

Jules Beauchamp, Jun 12 2025

Keywords

• nonn

Comments

Apart from a(1) = 2, all terms are congruent to 1 or 5 mod 6. It is therefore a subset of A007310.

Examples

			Since 7 is in the sequence, so is 7*2^3 + 3 = 59.
		

Crossrefs

Cf. A007310.