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A155881 as a simple table

na(n)
10
20
30
40
50
60
71
82
93
105
118
1224
1343
1467
15121
16188
17409
18708
191228
201946
214131
226241
2310525
2417866
2529428
2658369
2787881
28156261
29255242
30412545
31767846
321280460
332059307
343343656
355510186
369861418
3716472261
3826422596
3943917688
4073697381
41125281166
42206655249

[0,0,0,0,0,0,1,2,3,5,8,24,43,67,121,188,409,708,
 1228,1946,4131,6241,10525,17866,29428,58369,87881,
 156261,255242,412545,767846,1280460,2059307,
 3343656,5510186,9861418,16472261,26422596,
 43917688,73697381,125281166,206655249]