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A081964 as a simple table

na(n)
11
23
35
42
54
67
79
811
913
1015
116
128
1312
1414
1516
1617
1719
1823
1925
2029
2131
2210
2318
2420
2522
2624
2726
2827
2921
3033
3135
3237
3339
3441
3543
3645
3728
3832
3934
4038
4140
4244
4346
4447
4549
4651
4753
4857
4959
5061
5163
5267
5369
5471
5573
5630
5736
5842
5948
6050
6152
6254
6356
6458
6560
6662
6755
6865
6977
7079
7183
7285

[1,3,5,2,4,7,9,11,13,15,6,8,12,14,16,17,19,23,25,
 29,31,10,18,20,22,24,26,27,21,33,35,37,39,41,43,
 45,28,32,34,38,40,44,46,47,49,51,53,57,59,61,63,
 67,69,71,73,30,36,42,48,50,52,54,56,58,60,62,55,
 65,77,79,83,85]