%I #11 May 21 2023 12:28:40
%S 170,554,650,674,680,683,686,698,746,938,2090,2186,2210,2216,2219,
%T 2222,2234,2282,2570,2594,2600,2603,2606,2618,2690,2696,2699,2702,
%U 2720,2723,2732,2735,2738,2744,2747,2750,2762,2786
%N Numbers whose base-4 representation contains no 1's and exactly four 2's.
%t Select[Range[3000],DigitCount[#,4,1]==0&&DigitCount[#,4,2]==4&] (* _Harvey P. Dale_, May 09 2015 *)
%Y Cf. A007090.
%K nonn,base
%O 1,1
%A _Clark Kimberling_