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A049473 as a simple table

na(n)
00
11
21
32
43
54
64
75
86
96
107
118
128
139
1410
1511
1611
1712
1813
1913
2014
2115
2216
2316
2417
2518
2618
2719
2820
2921
3021
3122
3223
3323
3424
3525
3625
3726
3827
3928
4028
4129
4230
4330
4431
4532
4633
4733
4834
4935
5035
5136
5237
5337
5438
5539
5640
5740
5841
5942
6042
6143
6244
6345
6445
6546
6647
6747

[0,1,1,2,3,4,4,5,6,6,7,8,8,9,10,11,11,12,13,13,14,
 15,16,16,17,18,18,19,20,21,21,22,23,23,24,25,25,
 26,27,28,28,29,30,30,31,32,33,33,34,35,35,36,37,
 37,38,39,40,40,41,42,42,43,44,45,45,46,47,47]