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Numbers whose base-5 representation contains exactly two 0's and one 1.
0

%I #15 May 21 2023 00:22:14

%S 25,127,128,129,135,140,145,175,200,225,251,255,275,376,380,400,501,

%T 505,525,637,638,639,642,643,644,647,648,649,677,678,679,685,690,695,

%U 702,703,704,710,715,720,727,728,729,735,740,745,877,878,879,885,890,895

%N Numbers whose base-5 representation contains exactly two 0's and one 1.

%t Select[Range[800],DigitCount[#,5,0]==2&&DigitCount[#,5,1]==1&] (* _Harvey P. Dale_, Oct 06 2016 *)

%Y Cf. A007091.

%K nonn,base

%O 1,1

%A _Clark Kimberling_