Product of nonzero digits of A066549(n).

Terms

a(0) =2a(1) =15a(2) =7a(3) =21a(4) =108a(5) =2268a(6) =5040a(7) =79380a(8) =20575296a(9) =147a(10) =1134a(11) =102060a(12) =555660a(13) =1102248a(14) =1524096a(15) =48988800a(16) =1365590016a(17) =17360406a(18) =437482231200a(19) =559977255936a(20) =92876046336