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A061157
Numbers k such that k*2^m-1 is prime for exactly one exponent m in the range 0<=m<=k.
6
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
1,1
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..125
CROSSREFS
Cf. A061153, A061154, A061155, A061156. See A066158 for exponents.
Sequence in context: A101145 A109016 A084025 * A144378 A026037 A266088
KEYWORD
nonn
AUTHOR
Patrick De Geest, Apr 15 2001
EXTENSIONS
Offset corrected and more terms from Sean A. Irvine, Jan 24 2023
STATUS
approved