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A243811 Numbers n such that 2*n+3 and 2*n+5 are both prime. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 21 00:36 EST 2018. Contains 317427 sequences. (Running on oeis4.)