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A074990 as a simple table

na(n)
12
22
32
43
53
64
74
85
95
106
116
126
136
147
158
169
178
189
198
209
2110
2210
2310
2411
2512
2612
2713
2814
2913
3014
3113
3213
3314
3415
3516
3617
3717
3818
3918
4018
4117
4217
4317
4418
4518
4619
4719
4819
4919
5020
5121
5221
5321
5421
5522
5623
5723
5824
5923
6024
6124
6224
6324
6425
6526
6627
6727
6827
6927
7027
7127
7227
7326
7426
7527
7628

[2,2,2,3,3,4,4,5,5,6,6,6,6,7,8,9,8,9,8,9,10,10,10,
 11,12,12,13,14,13,14,13,13,14,15,16,17,17,18,18,
 18,17,17,17,18,18,19,19,19,19,20,21,21,21,21,22,
 23,23,24,23,24,24,24,24,25,26,27,27,27,27,27,27,
 27,26,26,27,28]