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A004523 as a simple table

na(n)
00
10
21
32
42
53
64
74
85
96
106
117
128
138
149
1510
1610
1711
1812
1912
2013
2114
2214
2315
2416
2516
2617
2718
2818
2919
3020
3120
3221
3322
3422
3523
3624
3724
3825
3926
4026
4127
4228
4328
4429
4530
4630
4731
4832
4932
5033
5134
5234
5335
5436
5536
5637
5738
5838
5939
6040
6140
6241
6342
6442
6543
6644
6744
6845
6946

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