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A140818 as a simple table

na(n)
11
22
32
42
52
62
72
86
96
102
112
128
136
148
152
162
1710
1820
1920
2010
212
222
2312
2430
2520
2630
2712
282
292
3014
3142
3270
3370
3442
3514
362
372
3816
3956
40112
4170
42112
4356
4416
452
462
4718
4872
49168
50252
51252
52168
5372
5418
552

[1,2,2,2,2,2,2,6,6,2,2,8,6,8,2,2,10,20,20,10,2,2,
 12,30,20,30,12,2,2,14,42,70,70,42,14,2,2,16,56,
 112,70,112,56,16,2,2,18,72,168,252,252,168,72,18,
 2]