Product of nonzero digits of A066553(n).

Terms

a(0) =1a(1) =15a(2) =63a(3) =3a(4) =315a(5) =120a(6) =2268a(7) =102060a(8) =241920a(9) =2953125a(10) =51438240a(11) =145212480a(12) =5290790400a(13) =76545a(14) =945a(15) =15120a(16) =1071630a(17) =26127360a(18) =106312500a(19) =1050197400a(20) =95591301120a(21) =1339231320a(22) =76204800a(23) =3135283200