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A018350 as a simple table

na(n)
11
22
33
44
55
66
78
810
912
1015
1116
1220
1324
1430
1540
1648
1760
1880
19120
20240

[1,2,3,4,5,6,8,10,12,15,16,20,24,30,40,48,60,80,
 120,240]