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A274505 Primes p such that 3*p-10 and 3*p+10 are prime numbers. 1
7, 11, 17, 19, 23, 31, 47, 61, 67, 89, 101, 107, 109, 137, 151, 163, 199, 283, 347, 353, 373, 397, 401, 409, 431, 439, 457, 479, 487, 523, 577, 607, 619, 641, 647, 661, 691, 761, 787, 809, 907, 929, 1033, 1087, 1103, 1153, 1201, 1229, 1307, 1319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of A023211 and A230227.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

7 is a term because 3*7-10 = 11 and 3*7+10 = 31 are primes.

MATHEMATICA

Select[Prime[Range[400]], PrimeQ[3 # - 10] && PrimeQ[3 # + 10] &]

PROG

(MAGMA) [p: p in PrimesUpTo(1500) |IsPrime(3*p-10) and IsPrime(3*p+10)];

CROSSREFS

Cf. A023211, A164568, A230227.

Sequence in context: A019365 A191055 A078497 * A256567 A155048 A296926

Adjacent sequences:  A274502 A274503 A274504 * A274506 A274507 A274508

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jun 30 2016

STATUS

approved

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Last modified January 17 20:36 EST 2020. Contains 330987 sequences. (Running on oeis4.)