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%I #3 Dec 05 2013 19:55:59
%S 1,2,4,8,16,32,64,128,640,1280,6400
%N a(1) = 1 and then smallest multiple of a(n) which has no nonzero digit in common with a(n).
%C The sequence is infinite and the pattern is visible after a(7): a(2n) = 2*a(2n-1) and a(2n+1) = 5*a(2n) n > 3.
%Y Cf. A079839.
%K base,nonn
%O 0,2
%A _Amarnath Murthy_, Feb 15 2003
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