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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”).

A345251 as a simple table

na(n)
11
22
33
46
57
610
711
815
918
1020
1130
1240

[1,2,3,6,7,10,11,15,18,20,30,40]