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A023229 Primes p such that 8*p + 3 is also prime. 4
2, 5, 7, 13, 17, 31, 41, 43, 47, 61, 71, 73, 101, 103, 107, 113, 127, 131, 157, 163, 181, 191, 197, 223, 233, 241, 251, 281, 283, 293, 307, 317, 337, 367, 383, 421, 433, 443, 457, 461, 467, 491, 503, 563, 631, 643, 647, 653, 673, 677, 691, 733, 751, 761, 787, 797, 811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MAPLE

a := proc (n) if isprime(n) = true and isprime(8*n+3) = true then n else end if end proc: seq(a(n), n = 1 .. 900); # Emeric Deutsch, Dec 26 2008

MATHEMATICA

Select[Prime@Range@500, PrimeQ[8 # + 3] &] (* Vincenzo Librandi, May 19 2014 *)

PROG

(MAGMA) [n: n in PrimesUpTo(1000) | IsPrime(8*n+3)]; // Vincenzo Librandi, Nov 20 2010

CROSSREFS

Cf. A005124, A007520.

Sequence in context: A092059 A260388 A169586 * A176983 A160676 A169690

Adjacent sequences:  A023226 A023227 A023228 * A023230 A023231 A023232

KEYWORD

nonn,easy

AUTHOR

David W. Wilson

STATUS

approved

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Last modified June 23 09:00 EDT 2021. Contains 345395 sequences. (Running on oeis4.)