A243811 Numbers n such that 2*n+3 and 2*n+5 are both prime.

0, 1, 4, 7, 13, 19, 28, 34, 49, 52, 67, 73, 88, 94, 97, 112, 118, 133, 139, 154, 172, 208, 214, 229, 259, 283, 298, 307, 319, 328, 403, 409, 412, 427, 439, 508, 514, 523, 529, 544, 574, 613, 637, 643, 649, 658, 712, 724, 739, 742, 802, 808, 832, 847, 859, 892, 934

Offset

1,3

Links

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

Formula

a(n) = A040040(n)-2.

Mathematica

Select[Range[0, 1000], PrimeQ[2 # + 3] && PrimeQ[2 # + 5] &]

Prog

(Magma) [n: n in [0..1000] | IsPrime(2*n+3) and IsPrime(2*n+5)];

Crossrefs

Cf. A040040, A067076, A089038.

Sequence in context: A191138 A075315 A238327 * A194073 A023496 A191868

Adjacent sequences: A243808 A243809 A243810 * A243812 A243813 A243814

Keyword

nonn,easy,less

Author

Vincenzo Librandi, Jun 11 2014

Status

approved