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A035325 Primes of form 2^k + k^2 + 1. 5
2, 101, 4241, 262469, 5846006549323611672814739330865132078623730198149, 6277101735386680763835789423207666416102355444464034549761, 105312291668557186697918027683670432318895095400549111254311024193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Corresponding n's (A100357) all are multiples of 6. - Zak Seidov, Apr 05 2014

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..9

MATHEMATICA

Select[Table[2^n + n^2 + 1, {n, 0, 300, 6}], PrimeQ ] (* Vincenzo Librandi, Sep 03 2012 *)

PROG

(MAGMA) [ a: n in [0..250] | IsPrime(a) where a is 2^n + n^2 + 1 ] // Vincenzo Librandi, Sep 03 2012

CROSSREFS

Cf. A100357 (corresponding n's). - Zak Seidov, Apr 05 2014

Sequence in context: A037053 A300102 A222449 * A266457 A028989 A113575

Adjacent sequences:  A035322 A035323 A035324 * A035326 A035327 A035328

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from James A. Sellers

STATUS

approved

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Last modified November 14 19:12 EST 2018. Contains 317214 sequences. (Running on oeis4.)