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A007457 as a simple table

na(n)
10
21
32
42
52
62
74
84
92
102
114
124
136
144
154
166
178
186
196
206
214
228
238
248
258
268
278
286
2910
308
3110
3210
338
3412
358
3610
3714
3812
3910
4012
4116
4210
4318
4414
4512
4614
4716
4814
4916
5014
5110
5216
5320
5414
5512
5616
5714
5820
5918
6014
6122
6220
6316
6420

[0,1,2,2,2,2,4,4,2,2,4,4,6,4,4,6,8,6,6,6,4,8,8,8,
 8,8,8,6,10,8,10,10,8,12,8,10,14,12,10,12,16,10,18,
 14,12,14,16,14,16,14,10,16,20,14,12,16,14,20,18,
 14,22,20,16,20]