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A154568 as a simple table

na(n)
18
210
315
418
514
612
76
89
912
1015
1122
1216
1310
1420
1516
1610
1718
1821
198
2014
2110
2220
2322
2416
2521
2626
2715
2822
2916
3018
3121
3226
3315
3424
3518
3614
3721
3815
3924
4022
4130
4220
4322
4415
4518
4620
4727
4826
4926
5024
5127
5234
5334
5421
5521
5622
5725
5832
5932
6028
6122
6227
6327
6436
6530
6625
6728
6818
6920
7018
7125

[8,10,15,18,14,12,6,9,12,15,22,16,10,20,16,10,18,
 21,8,14,10,20,22,16,21,26,15,22,16,18,21,26,15,24,
 18,14,21,15,24,22,30,20,22,15,18,20,27,26,26,24,
 27,34,34,21,21,22,25,32,32,28,22,27,27,36,30,25,
 28,18,20,18,25]