A099982 -id:A099982

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A099983

Bisection of A000043.

+10
1

3, 7, 17, 31, 89, 127, 607, 2203, 3217, 4423, 9941, 19937, 23209, 86243, 132049, 756839, 1257787, 2976221, 6972593, 20996011, 25964951, 32582657, 42643801, 57885161

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

FORMULA

a(n) = A000043(2*n). - Amiram Eldar, Oct 16 2024

MATHEMATICA

MersennePrimeExponent[Range[2, 48, 2]] (* Amiram Eldar, Oct 16 2024 *)

CROSSREFS

Cf. A000043, A099982.

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

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