1,1

Donovan Johnson, Table of n, a(n) for n = 1..1000

fQ[n_]:=And@@PrimeQ[{2n+1, 4n+3, 6n+5, 8n+7}]; Select[Prime@Range@77000, fQ] (* Harvey P. Dale, Dec 16 2010 *)

(Magma) [p: p in PrimesUpTo(1000000)| IsPrime(2*p+1) and IsPrime(4*p+3) and IsPrime(6*p+5) and IsPrime(8*p+7)]; // Vincenzo Librandi, Nov 13 2010

Cf. A107024: p, 2p+1, 4p+3, 6p+5, 8p+7, 10p+9, 12p+11, 14p+13 all prime; A107023: p, 2p+1, 4p+3, 6p+5, 8p+7, 10p+9, 12p+11 all prime; A107022: p, 2p+1, 4p+3, 6p+5, 8p+7, 10p+9 all prime; A107020: p, 2p+1, 4p+3, 6p+5 all prime; A007700: p, 2p+1, 4p+3 all prime; A005384: p, 2p+1 prime (p = Sophie Germain primes).

Cf. A005384, A007700, A107020, A107022, A107023, A107024.

Sequence in context: A099690 A196750 A349512 * A107022 A330901 A285693

Adjacent sequences: A107018 A107019 A107020 * A107022 A107023 A107024

Zak Seidov, May 09 2005

More terms from Vincenzo Librandi, Apr 01 2010

approved