A045222 - OEIS

%I #15 May 19 2023 20:17:05

%S 7,11,27,35,38,39,42,47,51,55,58,59,66,71,82,86,107,111,127,135,138,

%T 139,142,147,175,178,179,190,193,194,195,198,199,202,210,213,214,217,

%U 222,227,235,238,239,242,247,251,255,258,259,266

%N Numbers whose base-5 representation contains exactly one 1 and one 2.

%Y Cf. A007091.

%K nonn,base

%O 1,1

%A _Clark Kimberling_