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A279667 as a simple table

na(n)
11
22
34
44
56
68
78
812
912
1012
1116
1224
1324
1418
1532
1632
1724
1836
1924
2036
2132
2248
2336
2432
2548
2648
2748

[1,2,4,4,6,8,8,12,12,12,16,24,24,18,32,32,24,36,
 24,36,32,48,36,32,48,48,48]