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A018710 as a simple table

na(n)
11
22
33
44
55
66
79
810
912
1015
1118
1220
1325
1430
1536
1645
1750
1860
1975
2090
21100
22150
23180
24225
25300
26450
27900

[1,2,3,4,5,6,9,10,12,15,18,20,25,30,36,45,50,60,
 75,90,100,150,180,225,300,450,900]