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A191424 as a simple table

na(n)
01
10
21
31
46
520
695
7525
82975
920300
10143640
111131900
129548385
1386096010
14831475645
158488104625
1691828436700
171045926081200
1812517301471675
19157022728337475
202058625791347125
2128160968442356750
22401055626173702500
235936491984459286250

[1,0,1,1,6,20,95,525,2975,20300,143640,1131900,
 9548385,86096010,831475645,8488104625,91828436700,
 1045926081200,12517301471675,157022728337475,
 2058625791347125,28160968442356750,
 401055626173702500,5936491984459286250]