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A093975 as a simple table

na(n)
10
20
30
40
519
6476
77180
886637
9954456
109919519
1199655858
12979052296
139484975460
1491050561862
15868774394325
168257228721817
1778288453457352
18741199448968875

[0,0,0,0,19,476,7180,86637,954456,9919519,
 99655858,979052296,9484975460,91050561862,
 868774394325,8257228721817,78288453457352,
 741199448968875]