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A091857 as a simple table

na(n)
11
22
34
43
56
65
710
87
914
109
1112
1211
1322
1413
1526
1615
1718
1817
1934
2019
2138
2221
2324
2423
2546
2625
2720
2827
2930
3029
3158
3231
3362
3433
3536
3635
3728
3837
3974
4039
4142
4241
4382
4443
4586
4645
4740
4847
4994
5049
5156
5251
5348
5453
55106
5655
5744
5857
5954
6059
61118
6261
63122
6463
6560
6667

[1,2,4,3,6,5,10,7,14,9,12,11,22,13,26,15,18,17,34,
 19,38,21,24,23,46,25,20,27,30,29,58,31,62,33,36,
 35,28,37,74,39,42,41,82,43,86,45,40,47,94,49,56,
 51,48,53,106,55,44,57,54,59,118,61,122,63,60,67]