A057108 Difference between the smallest number S(n) with S(n)! a multiple of n and the largest prime factor of n [taking a(1)=0].

0, 0, 0, 2, 0, 0, 0, 2, 3, 0, 0, 1, 0, 0, 0, 4, 0, 3, 0, 0, 0, 0, 0, 1, 5, 0, 6, 0, 0, 0, 0, 6, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 3, 7, 5, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 5, 0, 0, 0, 0, 1, 6, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 5, 0, 7, 0, 5, 0, 0, 0, 0, 0