Number of nontrivial divisors of the n-th composite number.
1, 2, 2, 1, 2, 4, 2, 2, 3, 4, 4, 2, 2, 6, 1, 2, 2, 4, 6, 4, 2, 2, 2, 7, 2, 2, 6, 6, 4, 4, 2, 8, 1, 4
2 seqfan posts
Mon Aug 31 01:20:24 CEST 2009 [seqfan] Re: A144925: non-trivial divisors of composite numbers