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A071604 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1110
1211
1311
1412
1513
1614
1714
1815
1915
2016
2117
2217
2317
2418
2519
2619
2720
2821
2921
3022
3122
3223
3323
3423
3524
3625
3725
3825
3925
4026
4126
4227
4327
4427
4528
4628
4728
4829
4930
5031
5131
5231
5331
5432
5532
5633
5733
5833
5933
6034
6134
6234
6335
6436
6536
6636
6736
6836
6936
7037
7137
7238

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