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A049491 Numbers k such that k and k+128 are both prime. 2
3, 11, 23, 29, 53, 71, 83, 101, 113, 149, 179, 239, 251, 269, 281, 293, 311, 359, 419, 443, 449, 479, 491, 503, 563, 599, 641, 659, 683, 701, 809, 839, 863, 881, 911, 941, 1103, 1109, 1151, 1163, 1193, 1301, 1319, 1361, 1439, 1451, 1481, 1493, 1499, 1571 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

11 and 11+128 = 139 are both prime.

MATHEMATICA

Select[Prime[Range[300]], PrimeQ[#+128]&] (* Harvey P. Dale, Jan 16 2011 *)

PROG

(MAGMA) [n: n in [0..2000] | IsPrime(n) and IsPrime(n+128)]; // Vincenzo Librandi, Feb 02 2014

CROSSREFS

Cf. A001359, A023200, A023202.

Sequence in context: A289526 A289765 A141226 * A000355 A163769 A100860

Adjacent sequences:  A049488 A049489 A049490 * A049492 A049493 A049494

KEYWORD

nonn,easy

AUTHOR

Labos Elemer

STATUS

approved

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Last modified August 2 10:49 EDT 2021. Contains 346422 sequences. (Running on oeis4.)