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Numbers of form 5^k (values of k see A050726) containing no pair of consecutive equal digits (probably finite).
0

%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