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A247911 as a simple table

na(n)
11
22
32
43
53
64
75
85
96
106
117
128
138
149
1510
1610
1711
1811
1912
2013
2113
2214
2314
2415
2516
2616
2717
2817
2918
3019
3119
3220
3320
3421
3522
3622
3723
3823
3924
4025
4125
4226
4326
4427
4528
4628
4729
4829
4930
5031
5131
5232
5332
5433
5534
5634
5735
5835
5936
6037
6137
6238
6338
6439
6539
6640
6741
6841

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