a(n) = Product_{d|n, d>1} prime(A286622(d)-1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =18a(6) =7a(7) =8a(8) =15a(9) =50a(10) =11a(11) =108a(12) =11a(13) =98a(14) =195a(15) =16a(16) =5a(17) =450a(18) =11a(19) =500a(20) =357a(21) =242a(22) =19a(23) =648a(24) =55a(25) =242a(26) =345a(27) =1372a(28) =19a(29) =76050