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A059809 as a simple table

na(n)
12
23
34
45
56
68
710
812
914
1018
1120
1224
1332
1448
1560
1672
17168
18720

[2,3,4,5,6,8,10,12,14,18,20,24,32,48,60,72,168,
 720]