%I A023715
%S A023715 10,26,34,38,40,41,43,46,58,74,90,98,102,104,105,107,110,122,
%T A023715 130,134,136,137,139,142,146,150,152,153,155,158,160,161,163,
%U A023715 164,165,167,172,173,175,178,182,184,185,187,190,202,218,226
%N A023715 Numbers with exactly 2 2's in base 4 expansion.
%t A023715 Select[ Range[ 240 ], (Count[ IntegerDigits[ #, 4 ], 2 ]==2)& ]
%Y A023715 Sequence in context: A125035 A067264 A043342 this_sequence A045143 A005278 
               A157075
%Y A023715 Adjacent sequences: A023712 A023713 A023714 this_sequence A023716 A023717 
               A023718
%K A023715 nonn,base,easy
%O A023715 1,1
%A A023715 Olivier Gerard (olivier.gerard(AT)gmail.com)