Least k such that the k-th arithmetic derivative of n is zero, or 0 if no k exists.
1, 2, 2, 0, 2, 3, 2, 0, 4, 3, 2, 0, 2, 5, 0, 0, 2, 5, 2, 0, 4, 3, 2, 0, 4, 0, 0, 0, 2, 3, 2, 0, 6, 3
2 seqfan posts
Sun Jun 26 20:50:01 CEST 2011 [seqfan] Re: degree of integer