Greatest 8th-power-free divisor of n!.

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =5040a(7) =40320a(8) =362880a(9) =14175a(10) =155925a(11) =1871100a(12) =24324300a(13) =340540200a(14) =5108103000a(15) =81729648000a(17) =14889875a(18) =282907625a(19) =5658152500a(20) =118821202500