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A081493 as a simple table

na(n)
11
22
33
43
55
67
74
87
910
1013
115
129
1313
1417
1521
166
1711
1816
1921
2026
2131
227
2313
2419
2525
2631
2737
2843
298
3015
3122
3229
3336
3443
3550
3657
379
3817
3925
4033
4141
4249
4357
4465
4573
4610
4719
4828
4937
5046
5155
5264
5373
5482
5591
5611
5721
5831
5941
6051
6161
6271
6381
6491
65101
66111
6712
6823
6934
7045
7156
7267
7378
7489

[1,2,3,3,5,7,4,7,10,13,5,9,13,17,21,6,11,16,21,26,
 31,7,13,19,25,31,37,43,8,15,22,29,36,43,50,57,9,
 17,25,33,41,49,57,65,73,10,19,28,37,46,55,64,73,
 82,91,11,21,31,41,51,61,71,81,91,101,111,12,23,34,
 45,56,67,78,89]