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%I #8 Apr 27 2017 18:46:15
%S 5,25,25,125,125,125,125,625,625,625,625,625,625,625,625,3125,3125,
%T 3125,3125,3125,3125,3125,3125,3125,3125,3125,3125,3125,3125,3125,
%U 3125,15625,15625,15625,15625,15625,15625,15625,15625,15625,15625,15625
%N Smallest k for which k, 2k, ... nk all contain the digit 5.
%H Giovanni Resta, <a href="/A039936/b039936.txt">Table of n, a(n) for n = 1..10000</a>
%e a(3)=25 since 25, 50, and 75 all contain a 5.
%Y Cf. A039932, A039933, A039934, A039935, A039937, A039938, A039939, A039940.
%K base,nonn
%O 1,1
%A _Erich Friedman_
%E More terms from _Patrick De Geest_, Oct 15 1999
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