a(n) = (n + A332558(n))!/(n-1)!.

Terms

a(0) =120a(1) =120a(2) =60a(3) =840a(4) =15120a(5) =332640a(6) =55440a(7) =7920a(8) =2162160a(9) =240240a(10) =98017920a(11) =8910720a(12) =253955520a(13) =19535040a(14) =1395360a(15) =19769460480a(16) =1235591280a(17) =72681840a(18) =4037880a(19) =212520a(20) =4475671200a(21) =173059286400a(22) =7866331200a(23) =342014400a(24) =14250600a(26) =732058145280