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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”).

A378279 as a simple table

na(n)
10
20
31
44
520
6160
7910
85936
953424
10397440
113304620
1235023120
13322852816

[0,0,1,4,20,160,910,5936,53424,397440,3304620,
 35023120,322852816]