a(n) = product of decimal digits of A000043(n).

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =3a(5) =7a(6) =9a(7) =3a(8) =6a(9) =72a(10) =0a(11) =14a(12) =10a(13) =0a(14) =126a(15) =0a(16) =32a(17) =42a(18) =120a(19) =96a(20) =3888a(21) =324a(22) =6a(23) =1701a(24) =0a(25) =0a(26) =4032a(27) =1152a(28) =0a(29) =0