

A035325


Primes of form 2^k + k^2 + 1.


5



2, 101, 4241, 262469, 5846006549323611672814739330865132078623730198149, 6277101735386680763835789423207666416102355444464034549761, 105312291668557186697918027683670432318895095400549111254311024193
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OFFSET

1,1


COMMENTS

Corresponding k'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



