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%I #6 Mar 30 2012 17:26:09
%S 0,1,2,3,4,5,6,7,10
%N 4^n uses only distinct decimal digits.
%C There are exactly 9 such n's that 4^n uses only distinct digits.
%e 10 is (the last!) term because 4^10=1048576 uses only distinct digits.
%K fini,nonn,full,base
%O 1,3
%A _Zak Seidov_, Jul 01 2003
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