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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”).

A018699 as a simple table

na(n)
11
22
34
45
58
610
711
816
920
1022
1140
1244
1355
1480
1588
16110
17176
18220
19440
20880

[1,2,4,5,8,10,11,16,20,22,40,44,55,80,88,110,176,
 220,440,880]