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A051439 a(n) = prime(2^n + 1). 10
3, 5, 11, 23, 59, 137, 313, 727, 1621, 3673, 8167, 17881, 38891, 84047, 180511, 386117, 821647, 1742539, 3681149, 7754081, 16290073, 34136059, 71378603, 148948141, 310248251, 645155227, 1339484207, 2777105131, 5750079077 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Hugo Pfoertner, Table of n, a(n) for n = 0..57

Kim Walisch, Fast C++ prime counting function implementation.

MATHEMATICA

Prime[2^Range[0, 30]+1] (* Harvey P. Dale, Jan 19 2014 *)

CROSSREFS

Cf. A000040, A033844, A018249, A051438, A051440.

Sequence in context: A139376 A074892 A074874 * A214873 A330951 A018116

Adjacent sequences:  A051436 A051437 A051438 * A051440 A051441 A051442

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999

STATUS

approved

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Last modified July 7 16:08 EDT 2020. Contains 335496 sequences. (Running on oeis4.)