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A108918 as a simple table

na(n)
11
23
32
45
57
66
74
89
911
1010
1113
1215
1314
1412
158
1617
1719
1818
1921
2023
2122
2220
2325
2427
2526
2629
2731
2830
2928
3024
3116
3233
3335
3434
3537
3639
3738
3836
3941
4043
4142
4245
4347
4446
4544
4640
4749
4851
4950
5053
5155
5254
5352
5457
5559
5658
5761
5863
5962
6060
6156
6248
6332
6465

[1,3,2,5,7,6,4,9,11,10,13,15,14,12,8,17,19,18,21,
 23,22,20,25,27,26,29,31,30,28,24,16,33,35,34,37,
 39,38,36,41,43,42,45,47,46,44,40,49,51,50,53,55,
 54,52,57,59,58,61,63,62,60,56,48,32,65]