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A086521 as a simple table

na(n)
21
31
43
511
646
7210
81021
95202
1027477
11149324
12830357
134705386
1427087106
15158019030
16932390694
175555902302
1833391080001
19202196156448
201232550473918
217558030268270
2246592437224093
23288599067239678
241795348952256896

[1,1,3,11,46,210,1021,5202,27477,149324,830357,
 4705386,27087106,158019030,932390694,5555902302,
 33391080001,202196156448,1232550473918,
 7558030268270,46592437224093,288599067239678,
 1795348952256896]