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A047771 as a simple table

na(n)
10
20
30
40
50
61
70
88
90
1042
110
12232
130
141277
150
167183
170
1841041
190
20238315
210
221402076
230
248343804
250
2650136483
270
28303790544
290
301854115285
310
3211388104153
330
3470338364135
350
36436605050440
370
382722153369473
390
4017040017600925
410

[0,0,0,0,0,1,0,8,0,42,0,232,0,1277,0,7183,0,41041,
 0,238315,0,1402076,0,8343804,0,50136483,0,
 303790544,0,1854115285,0,11388104153,0,
 70338364135,0,436605050440,0,2722153369473,0,
 17040017600925,0]