OFFSET
1,1
COMMENTS
Primes of the form 8*n^2+14*n+7 = (2*n+2)*(4*n+3)+1 = A000384(2*n+2)+1. - Vincenzo Librandi, Apr 25 2010
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Table[x^2+7(x+1)^2, {x, 0, 100}], PrimeQ] (* Harvey P. Dale, May 03 2024 *)
PROG
(Magma) [ a: n in [0..250] | IsPrime(a) where a is 8*n^2+14*n+7 ] // Vincenzo Librandi, Apr 25 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Apr 22 2010
EXTENSIONS
Definition made more accurate by R. J. Mathar, May 04 2010
Corrected (inserted 7) and extended by Vincenzo Librandi, Apr 25 2010
Offset corrected by Mohammed Yaseen, May 20 2023
STATUS
approved