A353732 Inverse permutation to A352808: a(n) = index where n appears in A352808.

0, 1, 2, 6, 3, 4, 10, 11, 5, 7, 8, 18, 12, 19, 32, 44, 9, 16, 14, 24, 13, 17, 15, 45, 20, 21, 50, 56, 51, 52, 62, 63, 22, 25, 26, 27, 28, 29, 33, 40, 23, 30, 34, 78, 48, 70, 79, 122, 36, 64, 38, 84, 37, 71, 82, 98, 83, 85, 94, 123, 92, 148, 134, 210, 31, 41, 35, 46, 42, 47, 43, 72, 49, 53, 57, 73, 54, 76, 128, 162, 39, 65, 58, 96, 55, 68, 60

Offset

0,3

Links

Michael S. Branicky, Table of n, a(n) for n = 0..10000

Prog

(Python)
from itertools import count, islice
def agen(): # generator of terms
    A352808lst = [0, 1]; A352808set = {0, 1}; yield from [0, 1]
    mink = 2
    for n in count(2):
        ahalf, k = A352808lst[n//2], mink
        while k in A352808set or k&ahalf: k += 1
        A352808lst.append(k); A352808set.add(k)
        while mink in A352808set: yield A352808lst.index(mink); mink += 1
print(list(islice(agen(), 87))) # Michael S. Branicky, May 17 2022

Crossrefs

Cf. A353808, A353731.

Sequence in context: A130108 A201746 A362552 * A026203 A317025 A354804

Adjacent sequences: A353729 A353730 A353731 * A353733 A353734 A353735

Keyword

nonn

Author

N. J. A. Sloane, May 17 2022

Status

approved