A044879 Numbers having, in base 8, (sum of even run lengths)=(sum of odd run lengths).

513, 514, 515, 516, 517, 518, 519, 521, 530, 539, 548, 557, 566, 575, 577, 578, 579, 580, 581, 582, 583, 592, 593, 595, 596, 597, 598, 599, 600, 601, 602, 604, 605, 606, 607, 608, 609, 610, 611, 613, 614, 615, 616, 617, 618

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(oct(n)[2:]):
        rl = len(list(g))
        rl_sums[rl%2] += rl
    return rl_sums[0] == rl_sums[1]
print(list(filter(ok, range(619)))) # Michael S. Branicky, Sep 11 2021

Crossrefs

Cf. A007094.

Cf. A044873, A044874, A044875, A044876, A044877, A044878, A044880.

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

Sequence in context: A017421 A017553 A087931 * A060947 A182108 A066697

Adjacent sequences: A044876 A044877 A044878 * A044880 A044881 A044882

Keyword

nonn,base

Author

Clark Kimberling

Status

approved