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A069928 as a simple table

na(n)
11
21
32
42
53
64
75
85
95
105
116
126
137
148
159
169
1710
1810
1911
2012
2113
2214
2315
2415
2515
2615
2716
2816
2917
3018
3119
3219
3320
3420
3521
3621
3722
3823
3924
4024
4125
4226
4327
4428
4529
4630
4731
4831
4932
5032
5133
5233
5334
5435
5536
5637
5738
5838
5939
6040
6141
6242
6342
6442
6543
6644
6745
6846
6947
7048
7149
7249
7350
7450

[1,1,2,2,3,4,5,5,5,5,6,6,7,8,9,9,10,10,11,12,13,
 14,15,15,15,15,16,16,17,18,19,19,20,20,21,21,22,
 23,24,24,25,26,27,28,29,30,31,31,32,32,33,33,34,
 35,36,37,38,38,39,40,41,42,42,42,43,44,45,46,47,
 48,49,49,50,50]