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A089427 as a simple table

na(n)
01
11
21
33
44
518
633
7161
8433
91705
1010789
1129157
1288720
13490289
141881309
154731356
1617455195
1736595263
18178053588
19405917904
203256229459

[1,1,1,3,4,18,33,161,433,1705,10789,29157,88720,
 490289,1881309,4731356,17455195,36595263,
 178053588,405917904,3256229459]