A058779 Even numbers n such that n^2*2^n + 1 is prime.

2, 4, 30, 100, 142, 144, 150, 198, 304, 782, 858, 3638, 6076, 12876, 30180, 48470

Offset

1,1

References

Posting to NMBRTHRY(AT)LISTSERV.NODAK.EDU by Mike Oakes Dec 30 2000 entitled "Gaussian analogues of the Cullen and Woodall primes."

Links

Table of n, a(n) for n=1..16.

Index entries for Gaussian integers and primes

Mathematica

Do[ If[ PrimeQ[ n^2*2^n + 1], Print[n] ], {n, 2, 50000, 2} ]

Prog

(PARI) is(n)=n%2==0 && ispseudoprime(n^2*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A067195 A080230 A084914 * A359914 A230777 A344582

Adjacent sequences: A058776 A058777 A058778 * A058780 A058781 A058782

Keyword

nonn

Author

Robert G. Wilson v, Jan 02 2001

Status

approved