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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”).

A018515 as a simple table

na(n)
11
22
33
44
56
68
712
823
924
1046
1169
1292
13138
14184
15276
16552

[1,2,3,4,6,8,12,23,24,46,69,92,138,184,276,552]