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A247862 Primes p that generate the prime quadruplets p^3-4p+2k (for k = -2, -1, 1, 2). 1
3, 5, 67, 395407, 703903, 753583, 874373, 1280417, 1386977, 2920543, 3459487, 3697927, 3905527, 4384543, 4524427, 5630503, 6289343, 6379517, 7882873, 8599993, 8805653 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

5^3-4*5-4=101, 5^3-4*5-2=103, 5^3-4*5+2=107, 5^3-4*5+4=109 is a prime quadruplet, so 5 is in the sequence.

PROG

(PARI) lista(nn) = {forprime(p=2, nn, pp = p^3-4*p; if (isprime(pp-4) && isprime(pp-2) && isprime(pp+2) && isprime(pp+4), print1(p, ", ")); ); } \\ Michel Marcus, Oct 10 2014

CROSSREFS

Cf. A247863.

Sequence in context: A076513 A222611 A261071 * A145616 A306255 A122912

Adjacent sequences:  A247859 A247860 A247861 * A247863 A247864 A247865

KEYWORD

nonn,more

AUTHOR

Ray G. Opao, Sep 25 2014

EXTENSIONS

a(8)-a(21) from Michel Marcus, Oct 10 2014

STATUS

approved

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Last modified September 20 22:20 EDT 2019. Contains 327252 sequences. (Running on oeis4.)