OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = (A163623(n)-1)/120.
MATHEMATICA
Select[Range[200], PrimeQ[120 # + 1] &] (* Harvey P. Dale, May 29 2013 *)
PROG
(Magma) [n: n in [0..250]|IsPrime(120*n+1)]; // Vincenzo Librandi, Dec 13 2010
(PARI) is(n)=isprime(120*n+1) \\ Charles R Greathouse IV, Feb 20 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Zak Seidov, Aug 01 2009
STATUS
approved