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A043727 Numbers n such that number of runs in the base 2 representation of n is congruent to 3 mod 4. 1
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: A335486 A294277 A043721 * A043731 A043570 A043736

Adjacent sequences:  A043724 A043725 A043726 * A043728 A043729 A043730

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 3 14:22 EST 2020. Contains 338906 sequences. (Running on oeis4.)