Product of nonzero digits of A066547(n).

Terms

a(0) =1a(1) =6a(2) =120a(3) =504a(4) =2a(5) =60a(6) =336a(7) =288a(8) =40320a(9) =15552a(10) =1837080a(11) =1327104a(12) =309657600a(13) =393750000a(14) =2015539200a(15) =94097687040a(19) =720a(20) =3024a(21) =120960a(22) =10321920a(23) =28343520a(24) =334430208