A175153 Numbers n such that 13*n-1, 13*n+1 are twin primes.

24, 66, 84, 114, 144, 150, 156, 180, 210, 240, 294, 450, 504, 564, 576, 606, 690, 714, 726, 780, 810, 900, 906, 1026, 1176, 1236, 1284, 1404, 1494, 1530, 1566, 1596, 1614, 1620, 1680, 1734, 1740, 1746, 1860, 2130, 2196, 2394, 2424, 2466, 2490, 2544, 2550

Offset

1,1

Comments

All entries are divisible by 6. - Vincenzo Librandi, Aug 24 2014

Links

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

Example

For n=24, 13*24-1=311 and 13*24+1=313, which are twin primes.

Mathematica

Select[6 Range[3000], And@@PrimeQ[13 # + {1, -1}] &] (* Vincenzo Librandi, Aug 24 2014 *)

Prog

(Magma) [n: n in [1..3000] | IsPrime(13*n+1) and IsPrime(13*n-1)]

Crossrefs

Cf. A175152 (11*n-1 and 11*n+1 are twin primes).

Sequence in context: A127878 A205823 A347314 * A250799 A250791 A043154

Adjacent sequences: A175150 A175151 A175152 * A175154 A175155 A175156

Keyword

nonn,easy

Author

Vincenzo Librandi, Mar 08 2010

Status

approved