OFFSET
1,2
EXAMPLE
If n=89 then (23*n^2) - 16 = 182167 (prime).
PROG
(Magma) [n: n in [0..100000] |IsPrime((23*n^2)-16)] // Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(23*n^2-16) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Parthasarathy Nambi, Sep 30 2005
STATUS
approved