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A025556 as a simple table

na(n)
10
21
32
43
53
64
75
86
96
107
117
128
138
148
159
1610
1710
1811
1911
2011
2111
2212
2312
2413
2513
2614
2714
2815
2915
3016
3117
3217
3317
3417
3517
3618
3718
3818
3918
4019
4119
4220
4320
4420
4520
4621
4721
4822
4922
5022
5122
5223
5323
5423
5523
5623
5723
5824
5924
6025
6125
6225
6326
6426
6526
6627
6727
6827
6927
7028
7128
7229
7329
7429
7529
7629
7729
7830

[0,1,2,3,3,4,5,6,6,7,7,8,8,8,9,10,10,11,11,11,11,
 12,12,13,13,14,14,15,15,16,17,17,17,17,17,18,18,
 18,18,19,19,20,20,20,20,21,21,22,22,22,22,23,23,
 23,23,23,23,24,24,25,25,25,26,26,26,27,27,27,27,
 28,28,29,29,29,29,29,29,30]