Column 3 of array in A322770.

Terms

a(0) =40a(1) =172a(2) =801a(3) =4025a(4) =21709a(5) =124997a(6) =764538a(7) =4945866a(8) =33710579a(9) =241273791a(10) =1807949285a(11) =14146621349a(12) =115316563400a(13) =977216138500