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Numbers whose base-16 representation Sum_{i=0..m} d(i)*16^i has d(i)=0 for all odd i.
0

%I #9 Feb 12 2021 22:03:26

%S 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,32,48,64,80,96,112,128,144,

%T 160,176,192,208,224,240,256,257,258,259,260,261,262,263,264,265,266,

%U 267,268,269,270,271,512,513,514,515,516,517,518

%N Numbers whose base-16 representation Sum_{i=0..m} d(i)*16^i has d(i)=0 for all odd i.

%K nonn,base

%O 1,2

%A _Clark Kimberling_