Squarefree part of n equals bigomega(n).

Terms

a(0) =12a(1) =27a(2) =75a(3) =80a(4) =96a(5) =147a(6) =180a(7) =216a(8) =363a(9) =405a(10) =448a(11) =486a(12) =500a(13) =507a(14) =600a(15) =867a(16) =980a(17) =1008a(18) =1083a(19) =1125a(20) =1176a(21) =1350a(22) =1587a(23) =2205a(24) =2268a(25) =2420a(26) =2523a(27) =2560a(28) =2646a(29) =2800