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A146985 as a simple table

na(n)
01
12
22
33
44
53
65
76
86
95
107
1110
129
1310
147
1511
1614
1715
1815
1914
2011
2113
2222
2321
2425
2521
2622
2713
2817
2926
3033
3135
3235
3333
3426
3517
3619
3734
3839
3955
4049
4155
4239
4334
4419
4523
4638
4751
4865
4977
5077
5165
5251
5338
5423
5529
5646
5757
5885
5991
60121
6191
6285
6357
6446
6529

[1,2,2,3,4,3,5,6,6,5,7,10,9,10,7,11,14,15,15,14,
 11,13,22,21,25,21,22,13,17,26,33,35,35,33,26,17,
 19,34,39,55,49,55,39,34,19,23,38,51,65,77,77,65,
 51,38,23,29,46,57,85,91,121,91,85,57,46,29]