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A173997 as a simple table

na(n)
11
22
33
42
54
64
75
86
93
106
118
126
137
1410
159
164
178
1812
1912
208
219
2214
2315
2412
255
2610
2716
2818
2916
3010
3111
3218
3321
3420
3515
366
3712
3820
3924
4024
4120
4212
4313
4422
4527
4628
4725
4818
497
5014
5124
5230
5332
5430
5524
5614
5715
5826
5933
6036
6135
6230
6321
648
6516
6628
6736
6840
6940
7036
7128
7216

[1,2,3,2,4,4,5,6,3,6,8,6,7,10,9,4,8,12,12,8,9,14,
 15,12,5,10,16,18,16,10,11,18,21,20,15,6,12,20,24,
 24,20,12,13,22,27,28,25,18,7,14,24,30,32,30,24,14,
 15,26,33,36,35,30,21,8,16,28,36,40,40,36,28,16]