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A083381 as a simple table

na(n)
00
11
21
32
45
52
63
79
89
93
104
1113
1216
1313
144
155
1617
1723
1823
1917
205
216
2221
2330
2433
2530
2621
276
287
2925
3037
3143
3243
3337
3425
357
368
3729
3844
3953
4056
4153
4244
4329
448
459
4633
4751
4863
4969
5069
5163
5251
5333
549
5510
5637
5758
5873
5982
6085
6182
6273
6358
6437
6510
6611
6741
6865
6983
7095
71101
72101
7395
7483
7565
7641

[0,1,1,2,5,2,3,9,9,3,4,13,16,13,4,5,17,23,23,17,5,
 6,21,30,33,30,21,6,7,25,37,43,43,37,25,7,8,29,44,
 53,56,53,44,29,8,9,33,51,63,69,69,63,51,33,9,10,
 37,58,73,82,85,82,73,58,37,10,11,41,65,83,95,101,
 101,95,83,65,41]