OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
7 is a term because 3*7-10 = 11 and 3*7+10 = 31 are primes.
MATHEMATICA
Select[Prime[Range[400]], PrimeQ[3 # - 10] && PrimeQ[3 # + 10] &]
PROG
(Magma) [p: p in PrimesUpTo(1500) |IsPrime(3*p-10) and IsPrime(3*p+10)];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jun 30 2016
STATUS
approved