Square root of largest unitary square divisor of n!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =12a(7) =12a(8) =3a(9) =9a(10) =720a(11) =720a(12) =160a(13) =160a(14) =35a(15) =189a(16) =189a(17) =189a(18) =145152a(19) =145152a(20) =7257600a(21) =12800a(22) =275a(23) =275a(24) =136857600a(25) =684288000a(26) =4343625a(27) =17875a(28) =875875a(29) =875875