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A124854 Primes p=n/2 such that 5n+3 and 3n+5 are primes. 2
2, 7, 11, 17, 29, 31, 37, 43, 59, 73, 109, 137, 191, 193, 197, 227, 239, 263, 269, 337, 367, 373, 401, 409, 449, 479, 499, 541, 557, 701, 743, 757, 823, 827, 857, 941, 983, 997, 1033, 1051, 1109, 1163, 1303, 1361, 1471 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

select(t -> isprime(t) and isprime(10*t+3) and isprime(6*t+5), [2, seq(i, i=3..10^4, 2)]); # Robert Israel, Jun 11 2018

MATHEMATICA

Select[Prime@ Range@ 250, AllTrue[{10 # + 3, 6 # + 5}, PrimeQ] &] (* Michael De Vlieger, Jun 11 2018 *)

PROG

(PARI) isok(n) = isprime(n) && isprime(10*n+3) && isprime(6*n+5); \\ Michel Marcus, Oct 11 2013

CROSSREFS

Cf. A087505, A088879, A124853.

Sequence in context: A019385 A075552 A274504 * A240878 A109953 A165810

Adjacent sequences:  A124851 A124852 A124853 * A124855 A124856 A124857

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 10 2006

STATUS

approved

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Last modified January 29 16:58 EST 2020. Contains 331347 sequences. (Running on oeis4.)