A073648 Middle members of prime triples {p, p+2, p+6}.

7, 13, 19, 43, 103, 109, 193, 229, 313, 349, 463, 643, 823, 859, 883, 1093, 1279, 1303, 1429, 1483, 1489, 1609, 1873, 1999, 2083, 2239, 2269, 2659, 2689, 3253, 3463, 3529, 3673, 3919, 4003, 4129, 4519, 4639, 4789, 4933, 4969, 5233, 5479, 5503, 5653, 6199

Offset: 1

Author

Amarnath Murthy, Aug 09 2002

Keywords

• base
• nonn

Links

• Zak Seidov, Table of n,a(n) for n=1,2380, a(n)<2*10^6

Crossrefs

Cf. A073649, A073650.

Cf. A098412, A098414.

Programs

Mathematica

Transpose[Select[Partition[Prime[Range[850]],3,1],Differences[#]=={2,4}&]][[2]]  (* Harvey P. Dale, Feb 20 2011 *)

Formula

a(n) = A022004(n) + 2.

Extensions

More terms from Benoit Cloitre, Aug 13 2002