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A171175 as a simple table

na(n)
00
12
21
35
44
56
63
710
89
911
108
1112
127
1317
1416
1518
1615
1719
1814
1920
2013
2126
2225
2327
2424
2528
2623
2729
2822
2930
3021
3137
3236
3338
3435
3539
3634
3740
3833
3941
4032
4142
4231
4350
4449
4551
4648
4752
4847
4953
5046
5154
5245
5355
5444
5556
5643
5765
5864
5966
6063
6167
6262
6368

[0,2,1,5,4,6,3,10,9,11,8,12,7,17,16,18,15,19,14,
 20,13,26,25,27,24,28,23,29,22,30,21,37,36,38,35,
 39,34,40,33,41,32,42,31,50,49,51,48,52,47,53,46,
 54,45,55,44,56,43,65,64,66,63,67,62,68]