OFFSET
1,2
EXAMPLE
a(2) = prime(a(1)+1)-a(1) = 3-1 = 2;
a(3) = prime(a(2)+1)-a(2) = 5-2 = 3;
a(4) = prime(a(3)+1)-a(3) = 7-3 = 4;
a(5) = prime(a(4)+1)-a(4) = 11-4 = 7.
CROSSREFS
KEYWORD
nonn
AUTHOR
Gerasimov Sergey, Feb 19 2012
EXTENSIONS
a(19)-a(21) from Charles R Greathouse IV, Feb 20 2012
STATUS
approved