%I #5 Oct 16 2019 01:13:00
%S 1,7,49,343,2401,16807,823543,5764801,40353607,282475249,13841287201,
%T 232630513987207,65712362363534280139543
%N Numbers of form 7^k (values of k see A050728) containing no pair of consecutive equal digits (probably finite).
%Y Cf. A043096, A050728.
%K nonn,base
%O 0,2
%A _Patrick De Geest_, Sep 15 1999