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A112318 as a simple table

na(n)
00
11
22
32
43
54
64
75
86
96
107
117
128
139
149
1510
1610
1711
1812
1912
2013
2114
2214
2315
2415
2516
2617
2717
2818
2918
3019
3120
3220
3321
3421
3522
3623
3723
3824
3924
4025
4126
4226
4327
4428
4528
4629
4729
4830
4931
5031
5132
5232
5333
5434
5534
5635
5735
5836
5937
6037
6138
6239
6339
6440
6540
6641
6742
6842
6943
7043
7144
7245
7345

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