%I
%S 2222,12222,20222,21222,22022,22122,22202,22212,22220,22221,22223,
%T 22224,22225,22226,22227,22228,22229,22232,22242,22252,22262,22272,
%U 22282,22292,22322,22422,22522,22622,22722,22822,22922
%N Numbers having four 2's in base 10.
%H Daniel Starodubtsev, <a href="/A043500/b043500.txt">Table of n, a(n) for n = 1..10000</a>
%t Select[Range[30000],DigitCount[#,10,2]==4&] (* _Harvey P. Dale_, Oct 05 2012 *)
%Y Cf. A043496.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
