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A175153
Numbers n such that 13*n-1, 13*n+1 are twin primes.
1
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
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
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Mar 08 2010
STATUS
approved