A087706 A087705/5.

1, 1, 2, 7, 2, 6, 7, 3, 181, 6, 4, 7, 21, 5, 181, 42, 6, 17, 11, 7, 12, 21, 8, 482, 181, 9, 42, 16, 10, 17, 81, 11, 31, 32, 12, 56, 21, 13, 22, 482, 14, 181, 67, 15, 42, 26, 16, 27, 46, 17, 132, 81, 18, 232, 31, 19, 32, 417, 20

Offset

2,3

Links

Table of n, a(n) for n=2..60.

Prog

(Python)
from fractions import Fraction
def A087706(n):
    x = Fraction(n, 1)
    while x.denominator > 1 or x<=n:
        x = Fraction(5*x.__floor__(), 3)
    return int(x)//5 # Chai Wah Wu, Sep 01 2023

Crossrefs

Sequence in context: A332501 A365524 A157513 * A102447 A151869 A262083

Adjacent sequences: A087703 A087704 A087705 * A087707 A087708 A087709

Keyword

nonn

Author

N. J. A. Sloane, Sep 29 2003

Status

approved