%I #5 Oct 16 2019 01:19:30
%S 0,2,4,5,7,9,10,12,16
%N Decimal expansion of 11^n contains no pair of consecutive equal digits (probably finite).
%e 11^16 = 45949729863572161.
%Y Cf. A030706.
%K nonn,base
%O 0,2
%A _Patrick De Geest_, Sep 15 1999