OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..2500
MATHEMATICA
Select[Table[7n^3+1, {n, 0, 6000}], PrimeQ]
PROG
(Magma) [a: n in [0..400] | IsPrime(a) where a is 7*n^3+1]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 28 2011
STATUS
approved