A043397 - OEIS

%I #14 Apr 23 2023 21:58:15

%S 1,7,9,10,11,12,13,15,22,29,36,43,49,51,52,53,54,55,63,65,66,67,68,69,

%T 70,72,73,74,75,76,77,79,80,81,82,83,84,86,87,88,89,90,91,93,94,95,96,

%U 97,99,105,107,108,109,110,111,113,120,127

%N Numbers whose base-7 representation contains exactly one 1.

%Y Cf. A007093.

%K nonn,base

%O 1,2

%A _Clark Kimberling_