OFFSET
1,1
EXAMPLE
97 is a member because 95=5*19 and 93=3*31
PROG
(PARI) isok(n) = (n>5) && isprime(n) && (bigomega(n-2) == 2) && (bigomega(n-4) == 2); \\ Michel Marcus, Oct 05 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Feb 20 2004
EXTENSIONS
More terms from Ray Chandler, Feb 21 2004
STATUS
approved