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A191672 as a simple table

na(n)
11
23
32
45
54
66
78
87
99
1010
1112
1211
1313
1415
1514
1617
1716
1819
1921
2020
2118
2224
2323
2427
2529
2628
2725
2822
2933
3032
3137
3240
3339
3435
3531
3626
3745
3844
3951
4055
4153
4248
4343
4436
4530
4661
4760
4869
4975
5072
5165
5259
5349
5441
5534
5683
5781
5893
59101
6097
6188
6280
6367
6456
6547
6638

[1,3,2,5,4,6,8,7,9,10,12,11,13,15,14,17,16,19,21,
 20,18,24,23,27,29,28,25,22,33,32,37,40,39,35,31,
 26,45,44,51,55,53,48,43,36,30,61,60,69,75,72,65,
 59,49,41,34,83,81,93,101,97,88,80,67,56,47,38]