OFFSET
1,1
EXAMPLE
17=0^2+17, and 19 are prime.
26261=162^2+17 and 26263 are prime.
PROG
(PARI) isok(n) = isprime(n) && isprime(n+2) && issquare(n-17); \\ Michel Marcus, Aug 18 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
John L. Drost, Dec 16 2010
EXTENSIONS
a(26)-a(27) from Michel Marcus, Aug 18 2013
STATUS
approved