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A278215 as a simple table

na(n)
10
20
30
42
54
62
70
80
94
108
1112
1212
1312
149
156
164
170
180
196
2012
2118
2224
2326
2428
2526
2624
2722
2820
2918
3016
3112
328
334
340
350
368
3716
3824
3932
4040
4144
4248
4348
4448
4546
4644
4744
4842
4940
5038
5136
5232
5328
5424
5520
5616
5712
588
594
600

[0,0,0,2,4,2,0,0,4,8,12,12,12,9,6,4,0,0,6,12,18,
 24,26,28,26,24,22,20,18,16,12,8,4,0,0,8,16,24,32,
 40,44,48,48,48,46,44,44,42,40,38,36,32,28,24,20,
 16,12,8,4,0]