OFFSET
1,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
P. De Geest, Palindromic Quasipronics of the form n(n+x)
FORMULA
a(n) = sqrt(A028880(n)+6). - Zak Seidov, Mar 10 2015
MATHEMATICA
Select[Range[3, 500], PrimeQ[#^2 - 6] &] (* G. C. Greubel, Aug 19 2017 *)
PROG
(Magma) [n: n in [3..1000] |IsPrime(n^2 - 6 )]; // Vincenzo Librandi, Nov 19 2010
(PARI) is(n)=isprime(n^2-6) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved