n-th composite number appears n-th composite number times.
4, 4, 4, 4, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10
2 seqfan posts
Thu Dec 18 21:54:32 CET 2008 [seqfan] Re: A047210: First term and offset(?)