Greatest 5th-power-free divisor of n!.

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =5040a(7) =1260a(8) =11340a(9) =113400a(10) =1247400a(11) =1925a(12) =25025a(13) =350350a(14) =5255250a(15) =2627625a(16) =44669625a(17) =804053250a(18) =15277011750a(19) =305540235000a(24) =80164704620