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A018541 as a simple table

na(n)
11
22
33
44
55
66
78
810
912
1015
1120
1224
1325
1430
1540
1650
1760
1875
19100
20120
21150
22200
23300
24600

[1,2,3,4,5,6,8,10,12,15,20,24,25,30,40,50,60,75,
 100,120,150,200,300,600]