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A020475 as a simple table

na(n)
00
12
21
32
42
54
62
76
84
96
106
1110
125
1312
146
158
168
1716
1810
1918
2010
2114
2214
2322
2410
2520
2618
2718
2814
2928
3011
3130
3216
3326
3430
3526
3622
3736
3830
3930
4022
4140
4220
4342
4426
4526
4630
4746
4820
4942
5034
5132
5234
5352
5426
5546
5633
5750
5842
5958
6026
6160
6230
6346
6432
6550
6648
6766
6858
6950
7044
7170
7240
7372
7466
7546
7658

[0,2,1,2,2,4,2,6,4,6,6,10,5,12,6,8,8,16,10,18,10,
 14,14,22,10,20,18,18,14,28,11,30,16,26,30,26,22,
 36,30,30,22,40,20,42,26,26,30,46,20,42,34,32,34,
 52,26,46,33,50,42,58,26,60,30,46,32,50,48,66,58,
 50,44,70,40,72,66,46,58]