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Numbers of form 3^k (values of k see A050724) containing no pair of consecutive equal digits (probably finite).
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%I #5 Oct 16 2019 01:14:16

%S 1,3,9,27,81,243,729,2187,6561,19683,59049,1594323,4782969,14348907,

%T 43046721,129140163,387420489,10460353203,31381059609,282429536481,

%U 2541865828329,109418989131512359209,30903154382632612361920641803529

%N Numbers of form 3^k (values of k see A050724) containing no pair of consecutive equal digits (probably finite).

%Y Cf. A043096, A050724.

%K nonn,base

%O 0,2

%A _Patrick De Geest_, Sep 15 1999