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A081316 as a simple table

na(n)
12
23
32
41
55
65
75
85
96
106
116
126
137
147
157
167
178
188
198
208
219
229
239
249
259
2610
2710
2810
2910
3010
3111
3211
3311
3411
3511
3612
3712
3812
3912
4012
4113
4213
4313
4413
4513
4613
4714
4814
4914
5014
5114
5214
5315
5415
5515
5615
5715
5815
5916
6016
6116
6216
6316
6416
6517
6617
6717
6817
6917
7017
7117
7218
7318
7418
7518
7618
7718
7818

[2,3,2,1,5,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,
 9,10,10,10,10,10,11,11,11,11,11,12,12,12,12,12,13,
 13,13,13,13,13,14,14,14,14,14,14,15,15,15,15,15,
 15,16,16,16,16,16,16,17,17,17,17,17,17,17,18,18,
 18,18,18,18,18]