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%I #5 Jun 18 2015 13:00:47
%S 58,42,1,23,55,-1,45,53,24,65
%N a(n) = largest k such that the decimal representation of 5^k does not contain the digit n, or -1 if every power of 5 contains the digit n.
%C These values are only conjectural.
%H Popular Computing (Calabasas, CA), <a href="/A094776/a094776.jpg">Two Tables</a>, Vol. 1, (No. 9, Dec 1973), page PC9-16.
%K sign,fini,full,base
%O 0,1
%A _N. J. A. Sloane_, Jun 18 2015
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