Largest 3-smooth number dividing n!.

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =24a(5) =144a(6) =144a(7) =1152a(8) =10368a(9) =20736a(10) =20736a(11) =248832a(12) =248832a(13) =497664a(14) =1492992a(15) =23887872a(16) =23887872a(17) =429981696a(18) =429981696a(19) =1719926784a(20) =5159780352a(21) =10319560704a(22) =10319560704a(23) =247669456896a(24) =247669456896a(25) =495338913792