OFFSET
1,1
COMMENTS
a(n) mod 120 = 7 or 31 for all n.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..2400
EXAMPLE
a(2)=127 since 11^2+6=127 which is prime.
MATHEMATICA
Intersection[Table[n^2+6, {n, 0, 10^2}], Prime[Range[9*10^3]]] ...or... For[i=6, i<=6, a={}; Do[If[PrimeQ[n^2+i], AppendTo[a, n^2+i]], {n, 0, 100}]; Print["n^2+", i, ", ", a]; i++ ] - Vladimir Joseph Stephan Orlovsky, Apr 29 2008
Select[Table[n^2+6, {n, 0, 7000}], PrimeQ] (* Vincenzo Librandi, Nov 30 2011 *)
PROG
(Magma) [a: n in [0..700] | IsPrime(a) where a is n^2+6]; // Vincenzo Librandi, Nov 30 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Henry Bottomley, Jul 07 2000
STATUS
approved