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A173531 as a simple table

na(n)
00
11
22
34
44
54
68
716
88
94
108
1116
1216
1316
1432
1564
1616
174
188
1916
2016
2116
2232
2364
2432
2516
2632
2764
2864
2964
30128
31256
3232
334
348
3516
3616
3716
3832
3964
4032
4116
4232
4364
4464
4564
46128
47256
4864
4916
5032
5164
5264
5364
54128
55256
56128
5764
58128
59256
60256

[0,1,2,4,4,4,8,16,8,4,8,16,16,16,32,64,16,4,8,16,
 16,16,32,64,32,16,32,64,64,64,128,256,32,4,8,16,
 16,16,32,64,32,16,32,64,64,64,128,256,64,16,32,64,
 64,64,128,256,128,64,128,256,256]