a(n) = Product_{d|n} A019565(d)^[moebius(n/d) = -1].

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =2a(5) =18a(6) =2a(7) =5a(8) =6a(9) =30a(10) =2a(11) =75a(12) =2a(13) =90a(14) =60a(15) =7a(16) =2a(17) =210a(18) =2a(19) =105a(20) =180a(21) =126a(22) =2a(23) =245a(24) =10a(25) =210a(26) =14a(27) =525a(28) =2a(29) =132300