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A052471 as a simple table

na(n)
10
20
30
40
50
60
71
83
911
1034
1199
12279
13773
142103
155661
1615160
1740373
18107355
19285059
20757273
212013177
225361100
2314303274
2438250297
25102538714
26275597098
27742674804
282006661720
295436008057
3014763754746
3140196603110
32109703958381
33300091975184
34822705857129

[0,0,0,0,0,0,1,3,11,34,99,279,773,2103,5661,15160,
 40373,107355,285059,757273,2013177,5361100,
 14303274,38250297,102538714,275597098,742674804,
 2006661720,5436008057,14763754746,40196603110,
 109703958381,300091975184,822705857129]