A073650 -id:A073650 - cp's OEIS frontend

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

Amarnath Murthy, Aug 09 2002

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

Cf. A073649, A073650.

Cf. A098412, A098414.

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

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

More terms from Benoit Cloitre, Aug 13 2002

A073649 Define the composite field of a prime q to be f(q) = (t,s) if p, q, r are three consecutive primes and q-p = t and r-q = s. This is a sequence of primes q with field (4,2).

Original entry on oeis.org

11, 17, 41, 71, 101, 107, 197, 227, 281, 311, 461, 617, 827, 857, 881, 1091, 1301, 1427, 1451, 1487, 1667, 1697, 1787, 1871, 1877, 1997, 2087, 2141, 2381, 2687, 2711, 2801, 3167, 3257, 3461, 3467, 3851, 4157, 4517, 4787, 5231, 5417, 5441, 5651, 5657

Offset: 1

Amarnath Murthy, Aug 09 2002

nonn

Alois P. Heinz, Table of n, a(n) for n = 1..1000

Cf. A073648, A073650.
Cf. A098413, A098414.
Equals A022005 + 4.

Transpose[Select[Partition[Prime[Range[1200]],3,1],Differences[#] == {4,2}&]] [[2]] (* Harvey P. Dale, Jul 23 2011 *)

Corrected and extended by Benoit Cloitre, Aug 13 2002

A073651 Define the composite field of a prime q to be f(q) = (t,s) if p, q, r are three consecutive primes and q-p = t and r-q = s. This is a sequence of primes q with field (6,2).

Original entry on oeis.org

29, 59, 137, 179, 239, 269, 569, 599, 659, 1019, 1229, 1289, 1607, 1619, 2339, 2549, 2969, 3329, 3539, 3767, 3917, 3929, 4019, 4217, 4259, 4649, 4799, 5009, 5279, 5477, 5849, 5867, 6269, 6359, 6569, 6659, 6869, 7127, 7457, 7487, 7547, 7589, 8087, 8429, 8837, 8969, 9419, 9629

Offset: 1

Amarnath Murthy, Aug 09 2002

nonn

Alois P. Heinz, Table of n, a(n) for n = 1..1000

Cf. A073648, A073649, A073650.

Transpose[Select[Partition[Prime[Range[1200]],3,1],Differences[#]=={6,2}&]][[2]] (* Harvey P. Dale, Jul 23 2011 *)

Corrected and extended by Ryan Propper, Jul 10 2005

Corrected and extended by Harvey P. Dale, Jul 23 2011

cp's OEIS Frontend

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

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A073649 Define the composite field of a prime q to be f(q) = (t,s) if p, q, r are three consecutive primes and q-p = t and r-q = s. This is a sequence of primes q with field (4,2).

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Author

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Programs

Mathematica

Extensions

A073651 Define the composite field of a prime q to be f(q) = (t,s) if p, q, r are three consecutive primes and q-p = t and r-q = s. This is a sequence of primes q with field (6,2).

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Author

Keywords

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Mathematica

Extensions