A059391 a(1)=4; a(n) is a k(n)-almost prime; m is an A-almost prime (for 1<=A); a(n) = smallest number m>a(n-1) such that a(i)+m is a (A-k(i))-almost prime for i = 1,2,3,..,n-1.

4, 27, 208, 18630