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A221515 as a simple table

na(n)
10
20
30
40
51
60
70
82
91
100
110
123
133
142
150
160
174
187
1912
203
210
220
235
2413
2536
2630
275
280
290
306
3121
3280
33130
3489
358
360
370
387
3931
40150
41381
42532
43248
4413
450
460
478
4843
49252
50884
511970
522088
53706
5421
550
560
579
5857
59392
601765
615513
629940
638304
641995
6534
660
670
6810
6973
70576
713174
7212872
7333860

[0,0,0,0,1,0,0,2,1,0,0,3,3,2,0,0,4,7,12,3,0,0,5,
 13,36,30,5,0,0,6,21,80,130,89,8,0,0,7,31,150,381,
 532,248,13,0,0,8,43,252,884,1970,2088,706,21,0,0,
 9,57,392,1765,5513,9940,8304,1995,34,0,0,10,73,
 576,3174,12872,33860]