A237499 Odious Mersenne exponents.

2, 7, 13, 19, 31, 61, 107, 127, 521, 607, 1279, 3217, 11213, 21701, 44497, 132049, 216091, 756839, 1257787, 3021377, 6972593, 20996011, 24036583, 30402457, 37156667, 43112609, 82589933

Offset

1,1

Links

Table of n, a(n) for n=1..27.

Mathematica

Select[MersennePrimeExponent[Range[47]], OddQ @ DigitCount[#, 2][[1]] &] (* Amiram Eldar, Dec 10 2019 *)

Crossrefs

Intersection of A000043 and A027697.

Cf. A000069, A174265.

Sequence in context: A045375 A249419 A331544 * A231476 A138042 A053977

Adjacent sequences: A237496 A237497 A237498 * A237500 A237501 A237502

Keyword

nonn,base,more

Author

Ilya Lopatin and Juri-Stepan Gerasimov, Feb 08 2014

Extensions

a(13) and a(18) inserted and more terms added by Amiram Eldar, Dec 10 2019

a(27) added by Harvey P. Dale, Feb 01 2025

Status

approved