a(n) = Product_{d|n, d<n} A019565(d).

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =2a(5) =36a(6) =2a(7) =30a(8) =12a(9) =60a(10) =2a(11) =2700a(12) =2a(13) =180a(14) =120a(15) =210a(16) =2a(17) =7560a(18) =2a(19) =6300a(20) =360a(21) =252a(22) =2a(23) =661500a(24) =20a(25) =420a(26) =168a(27) =94500a(28) =2a(29) =23814000