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Numbers whose base-7 representation contains exactly one 6.
0

%I #14 Apr 23 2023 22:02:06

%S 6,13,20,27,34,41,42,43,44,45,46,47,55,62,69,76,83,90,91,92,93,94,95,

%T 96,104,111,118,125,132,139,140,141,142,143,144,145,153,160,167,174,

%U 181,188,189,190,191,192,193,194,202,209,216,223

%N Numbers whose base-7 representation contains exactly one 6.

%t Select[Range[300],DigitCount[#,7,6]==1&] (* _Harvey P. Dale_, Dec 26 2018 *)

%Y Cf. A007093.

%K nonn,base

%O 1,1

%A _Clark Kimberling_