A058778 - OEIS

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A058778

Numbers n such that n^2*2^n - n*2^((n + 1)/2) + 1 is prime.

0

3, 5, 19, 25, 29, 47, 167, 407, 3909, 4433, 4845, 4921, 30349, 78873

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

PROG

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

CROSSREFS

Sequence in context: A243898 A243900 A095826 * A211439 A088785 A277688

Adjacent sequences: A058775 A058776 A058777 * A058779 A058780 A058781

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jan 02 2001

STATUS

approved