Partial products of A027746.

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =24a(5) =120a(6) =240a(7) =720a(8) =5040a(9) =10080a(10) =20160a(11) =40320a(12) =120960a(13) =362880a(14) =725760a(15) =3628800a(16) =39916800a(17) =79833600a(18) =159667200a(19) =479001600a(20) =6227020800a(21) =12454041600a(22) =87178291200a(23) =261534873600