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A308172 as a simple table

na(n)
01
12
23
33
43
55
65
75
86
96
106
119
129
139
1410
1510
1610
1711
1811
1911
2013
2113
2213
2315
2415
2515
2617
2717
2817
2918
3018
3118
3219
3319
3419
3522
3622
3722
3823
3923
4024
4124
4224
4326
4426
4526
4629
4729
4829
4930
5030
5130
5231
5331
5431
5532
5632
5732
5835
5935
6035
6136
6236
6336
6438
6538
6638
6739
6839
6939
7040
7140
7243

[1,2,3,3,3,5,5,5,6,6,6,9,9,9,10,10,10,11,11,11,13,
 13,13,15,15,15,17,17,17,18,18,18,19,19,19,22,22,
 22,23,23,24,24,24,26,26,26,29,29,29,30,30,30,31,
 31,31,32,32,32,35,35,35,36,36,36,38,38,38,39,39,
 39,40,40,43]