A096478 a(n) = A000040(A096477(n)), i.e., prime(a(n)) and prime(1 + a(n)) are twin primes.

2, 3, 5, 7, 13, 17, 41, 43, 83, 89, 109, 113, 173, 277, 307, 313, 353, 373, 463, 563, 577, 601, 613, 643, 673, 719, 743, 1117, 1123, 1171, 1279, 1571, 1621, 1627, 1709, 1741, 1823, 1867, 1907, 1949, 1979, 1987, 1999, 2003, 2063, 2099, 2153, 2287, 2309, 2311

Offset

1,1

Comments

Gives primes in A029707. - Pierre CAMI, Apr 20 2006

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Example

n=10: a(10) = 89 means that prime(1 + 89) - prime(89) = 463 - 461 = 2; prime with subscript 89 (which is prime) and the next prime (i.e., prime(90)) are twin primes.

Mathematica

Prime[Flatten[Position[Table[Prime[Prime[n]+1]-Prime[Prime[n]], {n, 1, 1000}], 2]]]

Crossrefs

Cf. A006450, A072677, A073124, A096477.

Cf. A029707, A000720.

Sequence in context: A051026 A028865 A053435 * A342244 A076047 A245640

Adjacent sequences: A096475 A096476 A096477 * A096479 A096480 A096481

Keyword

nonn

Author

Labos Elemer, Jun 23 2004

Status

approved