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A006969 as a simple table

na(n)
17
28
39
49
59
67
78
88
98
107
117
128
139
1411
159
168
1712
1812
1912
209
2115
2214
2315
2415
2515
2613
2714
2814
2914
309
3116
3215
3316
3416
3516
3614
3715
3815
3915
4011
4118
4217
4318
4418
4518
4616
4717
4817
4917
5012
5119
5218

[7,8,9,9,9,7,8,8,8,7,7,8,9,11,9,8,12,12,12,9,15,
 14,15,15,15,13,14,14,14,9,16,15,16,16,16,14,15,15,
 15,11,18,17,18,18,18,16,17,17,17,12,19,18]