OFFSET
1,1
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
EXAMPLE
For p = 13; 13 + ceiling(sqrt(13)) = 17, which is prime.
MATHEMATICA
Select[Prime[Range[400]], PrimeQ[#+Ceiling[Sqrt[#]]]&] (* Harvey P. Dale, Aug 17 2019 *)
PROG
(PARI) isok(n) = isprime(n) && isprime(n + sqrtint(n) + 1); \\ Michel Marcus, Aug 15 2013
KEYWORD
nonn
AUTHOR
Kyle D. Balliet, Oct 24 2008, Nov 06 2008
EXTENSIONS
More terms from R. J. Mathar, Oct 31 2008
STATUS
approved