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A089279 as a simple table

na(n)
11
23
32
45
54
66
75
89
98
1010
119
1212
1311
1413
1512
1617
1716
1818
1917
2020
2119
2221
2320
2424
2523
2625
2724
2827
2926
3028
3127
3233
3332
3434
3533
3636
3735
3837
3936
4040
4139
4241
4340
4443
4542
4644
4743
4848
4947
5049
5148
5251
5350
5452
5551
5655
5754
5856
5955
6058
6157
6259
6358
6465
6564
6666
6765
6868
6967
7069
7168
7272

[1,3,2,5,4,6,5,9,8,10,9,12,11,13,12,17,16,18,17,
 20,19,21,20,24,23,25,24,27,26,28,27,33,32,34,33,
 36,35,37,36,40,39,41,40,43,42,44,43,48,47,49,48,
 51,50,52,51,55,54,56,55,58,57,59,58,65,64,66,65,
 68,67,69,68,72]