A124854 Primes p=n/2 such that 5n+3 and 3n+5 are primes.

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

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