a(n) is the least number with exactly n non-unitary square divisors.

Terms

a(0) =1a(1) =8a(2) =32a(3) =128a(4) =288a(5) =864a(6) =1152a(7) =2592a(8) =4608a(9) =13824a(10) =10368a(11) =20736a(12) =28800a(13) =41472a(14) =64800a(15) =279936a(16) =115200a(17) =331776a(18) =345600a(19) =663552a(20) =259200a(21) =1679616a(22) =518400a(23) =1620000a(24) =1166400a(25) =4860000a(26) =1036800a(27) =17915904a(28) =2073600a(29) =15552000