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%I #11 Apr 23 2023 02:22:41
%S 255,511,831,895,975,991,1011,1015,1020,1021,1279,1535,1855,1919,1999,
%T 2015,2035,2039,2044,2045,3135,3199,3279,3295,3315,3319,3324,3325,
%U 3391,3455,3535,3551,3571,3575,3580,3581,3855,3871
%N Numbers whose base-4 representation contains no 2's and exactly four 3's.
%Y Cf. A007090.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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