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A044873 Numbers having, in base 2, (sum of even run lengths)=(sum of odd run lengths). 3
9, 11, 13, 133, 135, 140, 143, 146, 148, 150, 152, 154, 156, 161, 164, 166, 172, 175, 178, 180, 182, 189, 196, 198, 200, 202, 206, 210, 212, 214, 216, 218, 220, 225, 228, 230, 236, 239, 241, 245, 247, 2065, 2069, 2071, 2077 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

PROG

(Python)

from itertools import groupby

def ok(n):

    rl_sums = [0, 0]

    for k, g in groupby(bin(n)[2:]):

        rl = len(list(g))

        rl_sums[rl%2] += rl

    return rl_sums[0] == rl_sums[1]

print(list(filter(ok, range(2078)))) # Michael S. Branicky, Sep 11 2021

CROSSREFS

Cf. A007088.

Cf. A044874, A044875, A044876, A044877, A044878, A044879, A044880.

Cf. A044881, A044882, A044883, A044884, A044885, A044886, A044887.

Sequence in context: A254936 A117675 A027726 * A341080 A279519 A307188

Adjacent sequences:  A044870 A044871 A044872 * A044874 A044875 A044876

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 22 06:54 EDT 2022. Contains 353933 sequences. (Running on oeis4.)