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A288817 as a simple table

na(n)
01
11
21
33
46
520
667
7291
81099
95780
1026249
11153238
12832366
135443440
1432738738
15239515824
161591963864
1712548347149
1893066370414

[1,1,1,3,6,20,67,291,1099,5780,26249,153238,
 832366,5443440,32738738,239515824,1591963864,
 12548347149,93066370414]