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A018509 as a simple table

na(n)
11
22
33
44
55
66
79
810
912
1015
1118
1220
1327
1430
1536
1645
1754
1860
1990
20108
21135
22180
23270
24540

[1,2,3,4,5,6,9,10,12,15,18,20,27,30,36,45,54,60,
 90,108,135,180,270,540]