A043727 - OEIS

A043727

Numbers whose number of runs in the base-2 representation is congruent to 3 mod 4.

5, 9, 11, 13, 17, 19, 23, 25, 27, 29, 33, 35, 39, 47, 49, 51, 55, 57, 59, 61, 65, 67, 71, 79, 85, 95, 97, 99, 103, 111, 113, 115, 119, 121, 123, 125, 129, 131, 135, 143, 149, 159, 165, 169, 171, 173, 181, 191, 193, 195, 199, 207, 213

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

MATHEMATICA

Select[Range[300], Mod[Length[Split[IntegerDigits[#, 2]]], 4]==3&] (* Harvey P. Dale, Dec 31 2017 *)

CROSSREFS

Sequence in context: A294277 A373674 A043721 * A043731 A043570 A043736

Adjacent sequences: A043724 A043725 A043726 * A043728 A043729 A043730

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved