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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”).

A360871 as a simple table

na(n)
10
20
32
44
59
620
744
8113
9329
101044
113622
1213544
1353596
14223084
15969158

[0,0,2,4,9,20,44,113,329,1044,3622,13544,53596,
 223084,969158]