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A048797 Primes p such that pp'-2 is prime, where p' denotes the next prime after p. 3
3, 157, 211, 257, 367, 557, 977, 997, 1381, 1511, 1531, 2467, 2503, 2621, 2777, 2861, 3049, 3307, 3617, 4099, 4357, 4373, 4397, 4463, 4523, 4691, 4831, 4919, 5087, 5209, 5261, 5351, 5407, 5483, 5807, 6173, 6229, 6287, 6619, 6871, 7001, 7187, 7459, 7577 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

3*5 - 2 = 13, a prime, so 3 is a term of the sequence.

MATHEMATICA

Prime[ Select[ Range[1000], PrimeQ[ Prime[ # ]Prime[ # + 1] - 2] &]]

PROG

(PARI) lista(nn) = {my(p=2); forprime(q=3, nn, if (isprime(p*q-2), print1(p, ", ")); p = q; ); } \\ Michel Marcus, Sep 28 2019

CROSSREFS

Cf. A123921, A124669.

Sequence in context: A203682 A316479 A139964 * A281799 A163320 A317820

Adjacent sequences:  A048794 A048795 A048796 * A048798 A048799 A048800

KEYWORD

nonn

AUTHOR

Joseph L. Pe, Jan 15 2002

STATUS

approved

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Last modified April 9 00:57 EDT 2020. Contains 333339 sequences. (Running on oeis4.)