OFFSET
1,1
COMMENTS
This sequence is infinite under the Bunyakovsky conjecture. - Charles R Greathouse IV, Apr 04 2012
Also primes of the form 16*m^2-2*m-1, by the substitution n=2*m-1. [Note that n is odd because otherwise 4n^2+7n+2 is even]. - Bruno Berselli, Jul 03 2012
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
f[n_] := (1+n)(2+2*n)+n*(3+2*n); lst={}; Do[If[PrimeQ[f[n]], AppendTo[lst, f[n]]], {n, 6!}]; lst
Select[Table[4*n^2+7*n+2, {n, 1000}], PrimeQ] (* Vincenzo Librandi, Aug 01 2012 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vladimir Joseph Stephan Orlovsky, Dec 17 2009
STATUS
approved