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A023232 Numbers n such that n and 8n + 9 both prime. 6
11, 13, 23, 29, 31, 41, 43, 53, 71, 73, 79, 83, 109, 149, 151, 193, 199, 211, 233, 251, 263, 269, 283, 331, 349, 353, 379, 389, 401, 419, 431, 461, 499, 521, 541, 563, 569, 599, 601, 643, 653, 659, 661, 673, 743, 809, 821, 853, 881, 911, 941, 983, 991, 1009, 1019, 1033 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Prime[Range[300]], PrimeQ[8#+9]&]  (* Harvey P. Dale, Jan 26 2011 *)

PROG

(MAGMA) [n: n in PrimesUpTo(1100) | IsPrime(8*n+9)]; // Vincenzo Librandi, Nov 20 2010

CROSSREFS

Sequence in context: A091998 A208296 A289696 * A075519 A019406 A289688

Adjacent sequences:  A023229 A023230 A023231 * A023233 A023234 A023235

KEYWORD

nonn,easy

AUTHOR

David W. Wilson

STATUS

approved

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)