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%I #2 Dec 05 2013 19:55:18
%S 1,12,12,12,0,12,1248163264128256,1248,12481632,0,1248163264128,12,
%T 1248,1248163264128256,0,1248,1248163264128256512,12481632,12481632,0,
%U 124816326412825651210242048,1248163264128,1248163264,1248,0,1248
%N Smallest concatenation of powers of 2 in ascending order that is a multiple of n, or 0 if no such number exists.
%C a(n) = 0 for n = 5k.
%K base,nonn
%O 1,2
%A _Amarnath Murthy_, Apr 24 2002
%E Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jul 09 2002