A073648 - OEIS

%I #18 Feb 04 2024 01:14:22

%S 7,13,19,43,103,109,193,229,313,349,463,643,823,859,883,1093,1279,

%T 1303,1429,1483,1489,1609,1873,1999,2083,2239,2269,2659,2689,3253,

%U 3463,3529,3673,3919,4003,4129,4519,4639,4789,4933,4969,5233,5479,5503,5653,6199

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

%H Zak Seidov, <a href="/A073648/b073648.txt">Table of n,a(n) for n=1,2380, a(n)<2*10^6</a>

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

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

%Y Cf. A073649, A073650.

%Y Cf. A098412, A098414.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Aug 09 2002

%E More terms from _Benoit Cloitre_, Aug 13 2002