Table read by rows: 2*A007318(n,m) - (-1)^(n+m)*A097806(n,m).
1, 3, 1, 2, 5, 1, 2, 6, 7, 1, 2, 8, 12, 9, 1, 2, 10, 20, 20, 11, 1, 2, 12, 30, 40, 30, 13, 1, 2
1 seqfan posts
Wed Jul 8 14:39:22 CEST 2009 [seqfan] bulk of A046055 (Orders of finite Abelian groups)