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A048047 as a simple table

na(n)
10
20
30
40
50
60
72
83
918
1063
1184
12224
13504
14630
151270
162420
172937
185742
1912012
2015015
2135035
2284119
23108164
24260064
25601664
26767244
271720944
283755844
294738410
3010329750
3122591800
3228583709
3364071194
34144780009
35184657869

[0,0,0,0,0,0,2,3,18,63,84,224,504,630,1270,2420,
 2937,5742,12012,15015,35035,84119,108164,260064,
 601664,767244,1720944,3755844,4738410,10329750,
 22591800,28583709,64071194,144780009,184657869]