Product of nonzero digits of A066551(n).

Terms

a(0) =1a(1) =36a(2) =12a(3) =360a(4) =1728a(5) =2a(6) =864a(7) =64800a(8) =62208a(9) =40960a(10) =57153600a(11) =8128512a(12) =31104a(13) =10497600a(14) =184320a(15) =31352832a(16) =414720a(17) =17418240a(18) =1360488960a(19) =54177693696a(21) =156764160000a(26) =82944