%I #9 Apr 21 2021 04:24:40
%S 1,2,3,4,5,6,7,8,9,10,121,133,145,157,169,181,193,205,217,229,241,242,
%T 254,266,278,290,302,314,326,338,350,362,363,375,387,399,411,423,435,
%U 447,459,471,483,484,496,508,520,532,544,556
%N Numbers whose base-11 run lengths alternate: odd, even, odd, ...
%K nonn,base
%O 1,2
%A _Clark Kimberling_