A076300 Numbers k such that prime(k) + s*k is prime, s=5.

1, 2, 6, 8, 10, 12, 14, 18, 30, 36, 38, 40, 48, 50, 52, 54, 64, 66, 68, 72, 74, 78, 80, 84, 96, 110, 118, 120, 122, 124, 134, 142, 148, 150, 154, 160, 178, 184, 186, 188, 198, 204, 210, 214, 220, 224, 228, 238, 240, 242, 246, 250, 252, 254, 258, 260, 268, 270

Offset: 1

Author

Zak Seidov, Oct 05 2002

Keywords

• nonn

Examples

			2 is in the sequence because p(2) + 5*2 = 3 + 10 = 13 is prime.
		

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A064402 (s=1), A076297 (s=2), A076298 (s=3), A076299 (s=4).

Programs

Magma

[n: n in [0..500]| IsPrime(NthPrime(n) +5*n)]; // Vincenzo Librandi, Apr 06 2011

Mathematica

Select[Range[300],PrimeQ[Prime[#]+5#]&] (* Harvey P. Dale, Nov 27 2013 *)

PARI

select(x->isprime(x), vector(500, n, prime(n) + 5*n), 1) \\ Michel Marcus, Jan 15 2015

PARI

isok(n) = isprime(prime(n) + 5*n); \\ Michel Marcus, May 05 2018