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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”).

A355311 as a simple table

na(n)
11
22
34
46
58
66
710
814
918
1010
1110
1214
1320
1418
1524
1636
1744
1822

[1,2,4,6,8,6,10,14,18,10,10,14,20,18,24,36,44,22]