A337810 Numbers k such that the number of prime factors, counted with multiplicity, of 2^k - 1 is less than the corresponding count for 2^k + 1.

1, 3, 5, 7, 9, 13, 15, 17, 19, 25, 26, 27, 31, 33, 34, 35, 37, 38, 41, 45, 46, 49, 51, 57, 59, 61, 62, 65, 67, 69, 77, 78, 81, 83, 85, 89, 91, 93, 97, 98, 99, 103, 107, 109, 111, 118, 122, 123, 125, 127, 129, 130, 131, 133, 134, 135, 137, 139, 141, 143, 145, 149

Offset

1,2

Links

Table of n, a(n) for n=1..62.

Prog

(PARI) for(n=1, 150, if(bigomega(2^n-1)<bigomega(2^n+1), print1(n, ", ")))

Crossrefs

Cf. A046051, A054992, A309942, A337811, A337812, A337813.

Sequence in context: A333369 A064608 A024893 * A355773 A119253 A307001

Adjacent sequences: A337807 A337808 A337809 * A337811 A337812 A337813

Keyword

nonn

Author

Hugo Pfoertner, Sep 23 2020

Status

approved