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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A018629 as a simple table

na(n)
11
22
33
44
56
67
79
812
914
1018
1121
1227
1328
1436
1542
1654
1763
1884
19108
20126
21189
22252
23378
24756

[1,2,3,4,6,7,9,12,14,18,21,27,28,36,42,54,63,84,
 108,126,189,252,378,756]