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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”).

A350428 as a simple table

na(n)
21
39
478
5657
65448
749869
8520416
95901138
1070092000
11902850273
1212416814432
13183763314090
142854581512832

[1,9,78,657,5448,49869,520416,5901138,70092000,
 902850273,12416814432,183763314090,2854581512832]