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A324480 as a simple table

na(n)
00
11
21
32
42
53
64
73
87
96
104
115
128
1310
145
156
167
1711
188
1912
2014
2110
2218
239
249
2513
2612
2720
2821
2924
3011
3122
3213
3314
3416
3517
3615
3715
3817
3918
4019
4136
4216
4323
4426
4523
4621
4727
4819
4927
5028
5120
5222
5325
5424
5543
5629
5747
5850
5925
6026
6137
6243
6349
6434
6528
6642
6752
6853
6930
7030

[0,1,1,2,2,3,4,3,7,6,4,5,8,10,5,6,7,11,8,12,14,10,
 18,9,9,13,12,20,21,24,11,22,13,14,16,17,15,15,17,
 18,19,36,16,23,26,23,21,27,19,27,28,20,22,25,24,
 43,29,47,50,25,26,37,43,49,34,28,42,52,53,30,30]