A079068 Largest prime less than greatest prime factor of n but not dividing n, or 1 of no such prime exists.

1, 1, 2, 1, 3, 1, 5, 1, 2, 3, 7, 1, 11, 5, 2, 1, 13, 1, 17, 3, 5, 7, 19, 1, 3, 11, 2, 5, 23, 1, 29, 1, 7, 13, 3, 1, 31, 17, 11, 3, 37, 5, 41, 7, 2, 19, 43, 1, 5, 3, 13, 11, 47, 1, 7, 5, 17, 23, 53, 1, 59, 29, 5, 1, 11, 7, 61, 13, 19, 3, 67, 1, 71, 31, 2, 17, 5, 11, 73, 3, 2, 37, 79, 5, 13, 41, 23