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A047303 as a simple table

na(n)
10
21
32
43
54
66
77
88
99
1010
1111
1213
1314
1415
1516
1617
1718
1820
1921
2022
2123
2224
2325
2427
2528
2629
2730
2831
2932
3034
3135
3236
3337
3438
3539
3641
3742
3843
3944
4045
4146
4248
4349
4450
4551
4652
4753
4855
4956
5057
5158
5259
5360
5462
5563
5664
5765
5866
5967
6069
6170
6271
6372
6473
6574
6676

[0,1,2,3,4,6,7,8,9,10,11,13,14,15,16,17,18,20,21,
 22,23,24,25,27,28,29,30,31,32,34,35,36,37,38,39,
 41,42,43,44,45,46,48,49,50,51,52,53,55,56,57,58,
 59,60,62,63,64,65,66,67,69,70,71,72,73,74,76]