A061157 Numbers k such that k*2^m-1 is prime for exactly one exponent m in the range 0<=m<=k.

11, 22, 37, 74, 109, 151, 247, 253, 337, 382, 403, 506, 509, 547, 674, 739, 764, 779, 806, 1325, 1478, 1528, 1558, 1589, 1597, 1612, 1871, 1987, 2263, 2279, 2317, 2759, 2797, 3056, 3116, 3194, 3329, 3341, 3719, 3742, 3761, 3821, 4001, 4412, 4526, 4558, 4559, 4603, 4736, 4813

Offset: 1

Author

Patrick De Geest, Apr 15 2001

Keywords

• nonn

Links

• Michael S. Branicky, Table of n, a(n) for n = 1..125

Crossrefs

Cf. A061153, A061154, A061155, A061156. See A066158 for exponents.

Extensions

Offset corrected and more terms from Sean A. Irvine, Jan 24 2023