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A120678 as a simple table

na(n)
12
25
36
47
57
67
710
810
98
108
119
1211
1311
149
159
168
1711
1811
1912
209
219
2212
2314
2412
2512
2613
2711
2810
2913
3012
3116
3210
3314
3410
359
369
3715
3815
3915
4012
4113
4211
4313
4413
4512
4613
4716
4810
4912
5013
5114
5214
5315
5413
5510
5611
5713
5816
5914
6013
6115
6213

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