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A161655 as a simple table

na(n)
11
22
34
46
56
68
78
88
99
1012
1112
1212
1314
1416
1516
1620
1718
1818
1920
2024
2124
2224
2324
2424
2527
2628
2728
2830
2930
3032
3132
3236
3336
3436
3536
3636
3738
3840
3940
4040
4142
4248
4344
4448
4548
4648
4748
4850
4951
5054
5152
5254
5354
5456
5556
5656
5760
5860
5960
6060
6162
6264
6366
6470
6568
6672
6768
6872
6972
7072
7172
7272

[1,2,4,6,6,8,8,8,9,12,12,12,14,16,16,20,18,18,20,
 24,24,24,24,24,27,28,28,30,30,32,32,36,36,36,36,
 36,38,40,40,40,42,48,44,48,48,48,48,50,51,54,52,
 54,54,56,56,56,60,60,60,60,62,64,66,70,68,72,68,
 72,72,72,72,72]