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A056474 as a simple table

na(n)
10
20
30
40
50
60
70
80
91
101
1115
1215
13140
14140
151050
161050
176951
186951
1942525
2042525
21246730
22246730
231379400
241379400
257508501
267508501
2740075035
2840075035
29210766920
30210766920
311096190550

[0,0,0,0,0,0,0,0,1,1,15,15,140,140,1050,1050,6951,
 6951,42525,42525,246730,246730,1379400,1379400,
 7508501,7508501,40075035,40075035,210766920,
 210766920,1096190550]