A043871 - OEIS

%I #6 Mar 25 2024 21:38:47

%S 68,70,71,72,73,75,76,77,78,97,98,99,100,102,103,108,109,110,113,114,

%T 115,116,118,119,120,121,123,132,134,135,136,137,139,140,141,142,145,

%U 146,147,152,153,155,156,157,158,177,178,179

%N Number of runs in the base 4 representation of n is congruent to 4 mod 10.

%t Select[Range[200],Mod[Length[Split[IntegerDigits[#,4]]],10]==4&] (* _Harvey P. Dale_, Mar 25 2024 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_