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A007599 as a simple table

na(n)
01
10
21
31
41
51
62
73
84
95
105
115
126
137
148
159
169
179
1810
1911
2011
2111
2212
2313
2414
2515
2615
2715
2816
2917
3017
3117
3218
3319
3419
3519
3620
3721
3821
3921
4022
4123
4224
4325
4425
4525
4626
4727
4827
4927
5028
5129
5229
5329
5430
5531
5631
5731
5832
5933
6033
6133
6234
6335
6435
6535
6636
6737
6837
6937
7038
7139
7239
7339
7440

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