OFFSET
1,1
COMMENTS
Primes of the form (prime(k)+prime(2k))/2.
MATHEMATICA
Select[Table[(Prime[n]+Prime[2n])/2, {n, 500}], PrimeQ] (* Harvey P. Dale, May 06 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Sep 10 2003
STATUS
approved