A043780 - OEIS

%I #6 Jul 03 2019 18:29:39

%S 91,92,96,97,100,101,102,104,138,140,141,142,145,146,150,151,172,173,

%T 177,178,181,182,183,185,192,194,195,196,208,209,210,212,253,254,258,

%U 259,262,263,264,266,271,272,274,278,280,281

%N Number of runs in the base 3 representation of n is congruent to 0 mod 5.

%t Select[Range[300],Mod[Length[Split[IntegerDigits[#,3]]],5]==0&] (* _Harvey P. Dale_, Jul 03 2019 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_