%I #4 Mar 31 2012 10:22:53
%S 3,9,63,189,729,729,2187,35721,45927,413343,413343,2657205,3720087,
%T 4782969,33480783,100442349,387420489,387420489,1162261467
%N Smallest lucky number that is the product of n lucky numbers.
%e a(5)=729 because 3^4*9=729, a(6)=729 because 3^6=729.
%Y Cf. A000959, A057616.
%K nonn
%O 1,1
%A _Sascha Kurz_, Oct 13 2001