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A160978 as a simple table

na(n)
10
20
30
40
50
60
70
81
91
101
111
121
131
141
151
162
171
182
191
202
211
222
231
244
252
264
274
285
294
307
315
329
338
349
359
3613
3710
3813
3913
4018
4115
4219
4317
4422
4522
4623
4722
4832
4927
5033
5132
5239
5337
5446
5543
5657
5752
5862
5960
6078
6170
6284
6385
64105
6599
66118
67113
68138
69134
70157
71153
72191
73178
74208
75208
76241
77234
78274
79266
80321
81312

[0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,2,1,2,1,2,1,2,1,4,
 2,4,4,5,4,7,5,9,8,9,9,13,10,13,13,18,15,19,17,22,
 22,23,22,32,27,33,32,39,37,46,43,57,52,62,60,78,
 70,84,85,105,99,118,113,138,134,157,153,191,178,
 208,208,241,234,274,266,321,312]