a(1) = 1, and for n > 1, a(n) = A276086(n) * a(A064989(n)).

Terms

a(0) =1a(1) =3a(2) =18a(3) =9a(4) =324a(5) =15a(6) =3240a(7) =15a(8) =270a(9) =810a(10) =291600a(11) =75a(12) =14580000a(13) =24300a(14) =2250a(15) =225a(16) =6561000000a(17) =1125a(19) =6750a(20) =607500a(21) =3645000a(23) =1875a(24) =337500a(25) =546750000a(26) =56250a(27) =1822500a(29) =105a(31) =21a(32) =1020600a(33) =918540000