A112529 Numbers n such that prime(n) +/- 2n are both primes.

7, 9, 12, 24, 30, 36, 63, 90, 102, 117, 126, 135, 150, 156, 165, 171, 180, 183, 225, 234, 270, 285, 369, 390, 399, 402, 447, 456, 501, 507, 537, 570, 582, 624, 627, 642, 651, 654, 660, 720, 735, 762, 777, 855, 864, 870, 885, 930, 936, 945, 1023, 1029, 1035

Offset

1,1

Comments

Cf. A064403: Prime(n) +/- n are both primes

Links

Table of n, a(n) for n=1..53.

Mathematica

Select[Range[2000], PrimeQ[Prime[ # ]+2# ]&&PrimeQ[Prime[ # ]-2# ]&]

Crossrefs

Cf. A064403.

Sequence in context: A048589 A121056 A174189 * A352876 A161892 A056528

Adjacent sequences: A112526 A112527 A112528 * A112530 A112531 A112532

Keyword

nonn

Author

Zak Seidov, Sep 10 2005

Status

approved