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Numbers whose base-10 representation has an odd number of runs.
2

%I #8 Jun 18 2021 23:07:28

%S 1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,101,102,103,104,105,106,

%T 107,108,109,111,120,121,123,124,125,126,127,128,129,130,131,132,134,

%U 135,136,137,138,139,140,141,142,143,145,146

%N Numbers whose base-10 representation has an odd number of runs.

%K nonn,base

%O 1,2

%A _Clark Kimberling_