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A221351 as a simple table

na(n)
10
20
30
40
51
60
70
818
97
100
110
12148
13370
1438
150
160
171164
1812296
196893
20190
210
220
238824
24364868
25938070
26122690
27918
280
290
3065932
3110612940
32103485930
3368449305
342152076
354367
360
370
38489456
39304064432
4011446121074
4127908486602
424937698670
4337541550

[0,0,0,0,1,0,0,18,7,0,0,148,370,38,0,0,1164,12296,
 6893,190,0,0,8824,364868,938070,122690,918,0,0,
 65932,10612940,103485930,68449305,2152076,4367,0,
 0,489456,304064432,11446121074,27908486602,
 4937698670,37541550]