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A128436 Primes p such that 2p - 3 and 2p - 1 are twin primes. 1
3, 7, 31, 37, 97, 157, 211, 331, 547, 577, 661, 727, 811, 937, 967, 1171, 1297, 1627, 2011, 2131, 2137, 2467, 2551, 2617, 3067, 3181, 3331, 3391, 3607, 4111, 4507, 4621, 4861, 5167, 5431, 5581, 5851, 6037, 6121, 6271, 6841, 6967, 7297, 7681, 7867, 8317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..46.

MATHEMATICA

Select[Prime[Range[1000]], PrimeQ[2# - 1] && PrimeQ[2# - 3] &] (* Ray Chandler *)

PROG

(MAGMA) [ p: p in PrimesUpTo(9000) | IsPrime(2*p-3) and IsPrime(2*p-1)] // Vincenzo Librandi, Jan 29 2011

CROSSREFS

Cf. A005382.

Sequence in context: A023266 A217198 A110581 * A213899 A034915 A145479

Adjacent sequences:  A128433 A128434 A128435 * A128437 A128438 A128439

KEYWORD

nonn

AUTHOR

Zak Seidov, Mar 03 2007

STATUS

approved

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Last modified September 20 07:59 EDT 2019. Contains 327214 sequences. (Running on oeis4.)