Product of factorials of the digits of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =40320a(9) =362880a(10) =1a(11) =1a(12) =2a(13) =6a(14) =24a(15) =120a(16) =720a(17) =5040a(18) =40320a(19) =362880a(20) =2a(21) =2a(22) =4a(23) =12a(24) =48a(25) =240a(26) =1440a(27) =10080a(28) =80640a(29) =725760