a(n) = Product_{d|n, d<n} A019565(A193231(d)).

Terms

a(0) =1a(1) =2a(2) =2a(3) =12a(4) =2a(5) =36a(6) =2a(7) =120a(8) =6a(9) =60a(10) =2a(11) =5400a(12) =2a(13) =360a(14) =30a(15) =25200a(16) =2a(17) =56700a(18) =2a(19) =21000a(20) =180a(21) =840a(22) =2a(23) =23814000a(24) =10a(25) =504a(26) =630a(27) =50400a(28) =2a(29) =661500