A044887 Numbers having, in base 16, (sum of even run lengths)=(sum of odd run lengths).

4097, 4098, 4099, 4100, 4101, 4102, 4103, 4104, 4105, 4106, 4107, 4108, 4109, 4110, 4111, 4113, 4130, 4147, 4164, 4181, 4198, 4215, 4232, 4249, 4266, 4283, 4300, 4317, 4334, 4351, 4353, 4354, 4355, 4356, 4357, 4358

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Crossrefs

Cf. A104619.

Cf. A044873, A044874, A044875, A044876, A044877, A044878, A044879.

Cf. A044880, A044881, A044882, A044883, A044884, A044885, A044886.

Programs

Python

from itertools import groupby
def ok(n):
    rl_sums = [0, 0]
    for k, g in groupby(hex(n)[2:]):
        rl = len(list(g))
        rl_sums[rl%2] += rl
    return rl_sums[0] == rl_sums[1]
print(list(filter(ok, range(4359)))) # Michael S. Branicky, Sep 11 2021