OFFSET
1,1
EXAMPLE
prime(2)=3 is in the sequence because 3+7*2 = 17 is prime.
prime(20)=71 is in the sequence because 71+7*20 = 211 is prime.
MATHEMATICA
Prime[Select[Range[300], PrimeQ[Prime[#] + 7# ]&]]
PROG
(Magma) [NthPrime(n): n in [1..300] | IsPrime(NthPrime(n)+7*n)];
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Feb 04 2015
STATUS
approved