Product of the nonzero digits (in base 10) of n^4.

Terms

a(0) =1a(1) =6a(2) =8a(3) =60a(4) =60a(5) =108a(6) =8a(7) =216a(8) =180a(9) =1a(10) =96a(11) =252a(12) =480a(13) =576a(14) =300a(15) =2700a(16) =240a(17) =1512a(18) =18a(19) =6a(20) =1152a(21) =1440a(22) =4032a(23) =2646a(24) =1620a(25) =45360a(26) =240a(27) =4320a(28) =784a(29) =8