OFFSET
1,1
EXAMPLE
(2^3-1)-(2^2-1)+1 = 5 = Mersenne-prime(2)-Mersenne-prime(1)+1 k=2 j=1 for n=1
(2^5-1)-(2^2-1)+1 = 29 = Mersenne-prime(3)-Mersenne-prime(1)+1 k=3 j=1 for n=2
(2^7-1)-(2^5-1)+1 = 97 = Mersenne-prime(4)-Mersenne-prime(3)+1 k=4 j=3 for n=3
and 5,29,97 are primes
CROSSREFS
KEYWORD
more,nonn,tabf
AUTHOR
Pierre CAMI, Oct 16 2004
STATUS
approved