A043785 - OEIS

%I #7 Jul 19 2024 13:53:52

%S 273,275,276,277,289,290,291,293,300,302,303,304,307,308,312,313,415,

%T 416,420,421,424,425,426,428,435,437,438,439,451,452,453,455,516,518,

%U 519,520,532,533,534,536,543,545,546,547,550

%N Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 6.

%t Select[Range[600],Mod[Length[Split[IntegerDigits[#,3]]],6]==0&] (* _Harvey P. Dale_, Jul 19 2024 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_