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A058767 Numbers n such that n^2*2^n + 1 is prime. 0
2, 4, 12, 52, 100, 108, 160, 2940, 2964, 17334, 21768, 41604, 65208, 72780 (list; graph; refs; listen; history; text; internal format)
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..14.

Index entries for Gaussian integers and primes

MATHEMATICA

Do[ If[ PrimeQ[ n*2^(n/2) + 1 ], Print[n] ], {n, 1, 100000} ]

PROG

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

CROSSREFS

Sequence in context: A030887 A030924 A030831 * A075876 A222470 A227037

Adjacent sequences:  A058764 A058765 A058766 * A058768 A058769 A058770

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jan 02 2001

STATUS

approved

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Last modified March 22 01:06 EDT 2019. Contains 321406 sequences. (Running on oeis4.)