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
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Mar 08 2010
STATUS
approved