A071925 Digitally balanced numbers: binary numbers which have the same number of 0's as 1's; decimal representation: A031443.

10, 1001, 1010, 1100, 100011, 100101, 100110, 101001, 101010, 101100, 110001, 110010, 110100, 111000, 10000111, 10001011, 10001101, 10001110, 10010011, 10010101, 10010110, 10011001, 10011010, 10011100, 10100011

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Formula

a(n) = A007088(A031443(n)).

Prog

(Python)
from itertools import islice, count
from sympy.utilities.iterables import multiset_permutations
def A071925gen(): # generator of terms
    for n in count(1):
        yield from (int('1'+''.join(p)) for p in multiset_permutations('0'*n+'1'*(n-1)))
A071925_list = list(islice(A071925gen(), 30)) # Chai Wah Wu, Dec 06 2021

Crossrefs

Cf. A007088, A031443.

Sequence in context: A135612 A110147 A215023 * A346434 A139101 A015482

Adjacent sequences: A071922 A071923 A071924 * A071926 A071927 A071928

Keyword

nonn,base

Author

Reinhard Zumkeller, Jun 14 2002

Status

approved