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A028397 as a simple table

na(n)
00
11
22
32
44
54
64
74
88
94
108
118
1212
138
1414
158
1616
178
1818
1914
2020
2116
2214
238
2424
2514
2614
2720
2814
2914
3030
318
3232
3314
3432
3514
3636
3714
3832
3914
4040
418
4214
4332
4444
4532
4646
4714
4848
4914
5050
5132
5250
5340
5446
558
5656
5732
5814
5944
6060
6146
6244
6314
6464
6514
6644
6750
688
6950
7044
7140
7272
738
7444
7556

[0,1,2,2,4,4,4,4,8,4,8,8,12,8,14,8,16,8,18,14,20,
 16,14,8,24,14,14,20,14,14,30,8,32,14,32,14,36,14,
 32,14,40,8,14,32,44,32,46,14,48,14,50,32,50,40,46,
 8,56,32,14,44,60,46,44,14,64,14,44,50,8,50,44,40,
 72,8,44,56]