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A048087 as a simple table

na(n)
10
20
30
40
50
60
73
815
920
1060
11140
12175
13360
14720
15891
161935
174455
185775
1913895
2032487
2142484
2297188
23216580
24282165
25632706
261418514
271863880
284259520
299690000
3012833436
3129366007
3266481107
3388256147
34200571107
35452679491

[0,0,0,0,0,0,3,15,20,60,140,175,360,720,891,1935,
 4455,5775,13895,32487,42484,97188,216580,282165,
 632706,1418514,1863880,4259520,9690000,12833436,
 29366007,66481107,88256147,200571107,452679491]