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A006247 as a simple table

na(n)
11
21
31
42
53
616
7135
83315
9158830
1014320182
112343203071
12691470685682
13366477801792538

[1,1,1,2,3,16,135,3315,158830,14320182,2343203071,
 691470685682,366477801792538]