OFFSET
1,2
COMMENTS
Arises from A056899: primes of the form m^2+2; m should be of the form 6n-3, hence this sequence.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = A056900(n-1) + 1. - Jeppe Stig Nielsen, May 14 2017
EXAMPLE
10 is a member because (60-3)^2 + 2 = 3251 is prime.
MATHEMATICA
Select[ Range[ 163], PrimeQ[(6# - 3)^2 + 2] &] (* Robert G. Wilson v, Feb 26 2004 *)
lst={}; Do[If[PrimeQ[(6n-3)^2+2], AppendTo[lst, n]], {n, 500}]; lst (* Vincenzo Librandi, Jul 16 2012 *)
PROG
(Magma) [n: n in [1..250]| IsPrime((6*n-3)^2+2)]; // Vincenzo Librandi, Jul 16 2012
(PARI) is(n)=isprime((6*n-3)^2+2) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Feb 22 2004
EXTENSIONS
More terms from Ray Chandler and Robert G. Wilson v, Feb 25 2004
STATUS
approved