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A099982
Bisection of A000043.
1
2, 5, 13, 19, 61, 107, 521, 1279, 2281, 4253, 9689, 11213, 21701, 44497, 110503, 216091, 859433, 1398269, 3021377, 13466917, 24036583, 30402457, 37156667, 43112609
OFFSET
1,1
FORMULA
a(n) = A000043(2*n-1). - Amiram Eldar, Oct 16 2024
MATHEMATICA
MersennePrimeExponent[Range[1, 48, 2]] (* Amiram Eldar, Oct 16 2024 *)
CROSSREFS
Sequence in context: A068371 A327909 A072899 * A298991 A046696 A102719
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 19 2004
EXTENSIONS
Offset corrected and a(20)-a(24) added by Amiram Eldar, Oct 16 2024
STATUS
approved