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A176815 as a simple table

na(n)
10
20
30
40
58
610
712
80
918
1018
1128
1224
1318
1430
1524
1630
1730
1842
1930
2018
2130
2248
2330
2442
2554
2630
2724
2824
2942
3054
3130
3242
3336
3442
3542
3642
3754
3860
3960
4024
4148
4230
4360
4436
4560
4672
4718
4884
4936
5078
5136
5242
5342
5418
5524
5630
5742
5860
5936
6030
6184
6254
6330
6448
6584
6666
6748
6860
6954
7072
7136

[0,0,0,0,8,10,12,0,18,18,28,24,18,30,24,30,30,42,
 30,18,30,48,30,42,54,30,24,24,42,54,30,42,36,42,
 42,42,54,60,60,24,48,30,60,36,60,72,18,84,36,78,
 36,42,42,18,24,30,42,60,36,30,84,54,30,48,84,66,
 48,60,54,72,36]