Partial products of A001037.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =12a(6) =72a(7) =648a(8) =11664a(9) =349920a(10) =19595520a(11) =1939956480a(12) =360831905280