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A120504 as a simple table

na(n)
11
21
32
43
53
63
74
85
96
106
117
128
139
149
159
169
1710
1811
1912
2012
2113
2214
2315
2415
2516
2617
2718
2818
2918
3019
3120
3221
3321
3422
3523
3624
3724
3825
3926
4027
4127
4227
4327
4427
4528
4629
4730
4830
4931
5032
5133
5233
5334
5435
5536
5636
5736
5837
5938
6039

[1,1,2,3,3,3,4,5,6,6,7,8,9,9,9,9,10,11,12,12,13,
 14,15,15,16,17,18,18,18,19,20,21,21,22,23,24,24,
 25,26,27,27,27,27,27,28,29,30,30,31,32,33,33,34,
 35,36,36,36,37,38,39]