Smallest square divisible by n!.

Terms

a(0) =1a(1) =1a(2) =4a(3) =36a(4) =144a(5) =3600a(6) =3600a(7) =176400a(8) =2822400a(9) =25401600a(10) =25401600a(11) =3073593600a(12) =110649369600