

A156252


Primes of the form 4*n^2+6*n+43.


2



43, 53, 71, 97, 131, 173, 223, 281, 347, 421, 503, 593, 691, 797, 911, 1033, 1163, 1301, 1447, 1601, 1933, 2111, 2297, 2693, 2903, 3121, 3347, 3581, 3823, 4073, 4597, 4871, 5153, 5443, 5741, 6047, 6361, 7013, 7351, 8783, 9161, 9547, 9941, 10343, 10753
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OFFSET

1,1


COMMENTS

4*n^2+6*n+43 is a prime number for all n up to 19.
Subsequence of A005846. (Substitute n=2k+1 in the definition of A005846 to show this.) [R. J. Mathar, Feb 19 2009]


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Vincenzo Librandi, Prime Generating Polynomials.


MATHEMATICA

Select[Table[4*n^2+6*n+43, {n, 0, 700}], PrimeQ] (* Vincenzo Librandi, Jul 26 2012 *)


PROG

(MAGMA) [a: n in [0..100]  IsPrime(a) where a is 4*n^2+6*n+43 ]; // Vincenzo Librandi, Jul 26 2012


CROSSREFS

Sequence in context: A128653 A080104 A095744 * A306627 A174818 A280388
Adjacent sequences: A156249 A156250 A156251 * A156253 A156254 A156255


KEYWORD

nonn,easy


AUTHOR

Vincenzo Librandi, Feb 07 2009


STATUS

approved



