A099910 Number of distinct prime-factors of ((prime(n)*(prime(n+1)-1)+(prime(n)-1)*prime(n+1))/2).

1, 1, 2, 1, 2, 2, 2, 1, 2, 3, 2, 1, 3, 1, 2, 1, 2, 2, 2, 3, 2, 2, 4, 3, 1, 2, 2, 3, 3, 2, 2, 3, 2, 1, 2, 3, 3, 3, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 3, 2, 2, 2, 3, 2, 1, 2, 3, 4, 1, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 4, 4, 2, 2, 2, 3, 2, 3, 1, 1, 3, 1, 4, 3, 1, 4, 3, 1, 2, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 1, 1, 3, 1, 3, 3