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A098643 as a simple table

na(n)
10
20
31
40
50
62
70
80
96
100
110
1252
130
140
151471
160
170
18135029
190
200
2141906834
220
230
2445729175098
250
260

[0,0,1,0,0,2,0,0,6,0,0,52,0,0,1471,0,0,135029,0,0,
 41906834,0,0,45729175098,0,0]