OFFSET
1,1
COMMENTS
2*a(n) + 103 is a square. - Vincenzo Librandi, Apr 10 2015
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Table[2n^2+22n+9, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jul 23 2012 *)
PROG
(Magma) [a: n in [0..400] | IsPrime(a) where a is 2*n^2+22*n+9]; // Vincenzo Librandi, Jul 23 2012
(PARI) for (n=0, 300, if (isprime (k=2*n^2+14*n+5), print1 (k, ", "))); \\ Vincenzo Librandi, Jul 23 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jan 12 2009
STATUS
approved