%I #7 Mar 06 2016 13:19:11
%S 1,5,25,125,625,3125,15625,78125,390625,1953125,9765625,6103515625,
%T 30517578125,152587890625,762939453125,3814697265625,19073486328125,
%U 95367431640625,476837158203125,2384185791015625,7450580596923828125
%N Numbers of form 5^k (values of k see A050726) containing no pair of consecutive equal digits (probably finite).
%Y Subsequence of A000351.
%Y Cf. A043096, A050726.
%K nonn,base
%O 0,2
%A _Patrick De Geest_, Sep 15 1999