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A018559 as a simple table

na(n)
11
22
33
45
56
67
79
810
914
1015
1118
1221
1330
1435
1542
1645
1763
1870
1990
20105
21126
22210
23315
24630

[1,2,3,5,6,7,9,10,14,15,18,21,30,35,42,45,63,70,
 90,105,126,210,315,630]