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A339889 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1617
1718
1819
1920
2021
2122
2223
2324
2425
2526
2627
2728
2829
2930
3031
3133
3234
3335
3436
3537
3638
3739
3840
3941
4042
4143
4244
4345
4446
4547
4648
4749
4850
4951
5052
5153
5254
5355
5456
5557
5658
5759
5860
5961
6062
6163
6265
6366
6467
6568
6669
6770

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,19,20,
 21,22,23,24,25,26,27,28,29,30,31,33,34,35,36,37,
 38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
 54,55,56,57,58,59,60,61,62,63,65,66,67,68,69,70]