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A191456 Primes p such that the polynomial x^2+x+p generates only primes for x=1..9. 12
11, 17, 41, 844427, 51448361, 86966771, 122983031, 180078317, 960959381, 1278189947, 1761702947, 1829187287, 2426256797, 2911675511, 3013107257, 4778888351, 5221343711 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..2713

PROG

(PARI) is(n)=for(x=0, 9, if(!isprime(x^2+x+n), return(0))); 1 \\ Charles R Greathouse IV, Sep 14 2015

CROSSREFS

Generates primes for x=1..k: A001359 (1), A022004 (2), A172454 (3), A187057 (4), A187058 (5), A144051 (6), A187060 (7), A190800 (8). Each is by definition a subsequence of preceding sequences.

Cf. A160548.

Sequence in context: A331940 A187060 A190800 * A146036 A248482 A267772

Adjacent sequences:  A191453 A191454 A191455 * A191457 A191458 A191459

KEYWORD

nonn

AUTHOR

Zak Seidov, Jun 02 2011

STATUS

approved

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Last modified October 20 10:00 EDT 2020. Contains 337900 sequences. (Running on oeis4.)