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A181974 as a simple table

na(n)
01
11
21
32
43
51
63
74
82
91
105
117
125
134
141
158
1611
1710
189
193
201
2113
2218
2320
2420
259
265
271
2821
2929
3038
3140
3222
3315
344
351
3634
3747
3871
3978
4051
4140
4214
436
441
4555
4676
47130
48147
49111
5095
5140
5222
535
541
5589
56123
57235
58272
59233
60213
61105
6268
6320
647
651

[1,1,1,2,3,1,3,4,2,1,5,7,5,4,1,8,11,10,9,3,1,13,
 18,20,20,9,5,1,21,29,38,40,22,15,4,1,34,47,71,78,
 51,40,14,6,1,55,76,130,147,111,95,40,22,5,1,89,
 123,235,272,233,213,105,68,20,7,1]