A037327 Numbers whose base-6 and base-7 expansions have the same digit sum.

1, 2, 3, 4, 5, 66, 67, 68, 69, 126, 127, 128, 129, 130, 131, 156, 157, 158, 159, 160, 189, 190, 191, 246, 247, 248, 249, 250, 251, 280, 281, 308, 309, 310, 311, 366, 367, 368, 369, 370, 396, 397, 398, 456, 457, 458, 459, 460, 461, 518, 519, 520, 521, 546, 547

Offset

1,2

Links

Table of n, a(n) for n=1..55.

Formula

{n: A053827(n) = A053828(n)}. - R. J. Mathar, Jun 30 2021

Prog

(PARI) isok(k) = sumdigits(k, 6) == sumdigits(k, 7); \\ Michel Marcus, Mar 18 2023
(Python)
from numpy import base_repr
def ok(n):
    return sum(map(int, base_repr(n, 6))) == sum(map(int, base_repr(n, 7)))
print([n for n in range(1, 10**5) if ok(n)])
# Christoph B. Kassir, Apr 05 2023

Crossrefs

Cf. A053827, A053828.

Sequence in context: A069881 A004856 A325653 * A075832 A037434 A033170

Adjacent sequences: A037324 A037325 A037326 * A037328 A037329 A037330

Keyword

nonn,base

Author

Clark Kimberling

Status

approved