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A056438 as a simple table

na(n)
10
20
30
40
50
61
71
818
959
10630
111681
1228867
1360083
14757577
153514504
1621424002
1764372109
181024999230
192026631203
2026920955243
21105501588415
22742299898741
231974251382095
2431721456317841
2574052852505684

[0,0,0,0,0,1,1,18,59,630,1681,28867,60083,757577,
 3514504,21424002,64372109,1024999230,2026631203,
 26920955243,105501588415,742299898741,
 1974251382095,31721456317841,74052852505684]