A096687 Least k such that decimal representation of k*n contains only digits 0 and 8.

8, 4, 296, 2, 16, 148, 1144, 1, 98765432, 8, 8, 74, 616, 572, 592, 5, 5224, 49382716, 4632, 4, 3848, 4, 38296, 37, 32, 308, 326255144, 286, 303752, 296, 28648, 25, 26936, 2612, 2288, 24691358, 24, 2316, 2072, 2, 2168, 1924, 204856, 2, 197530864, 19148

Offset

1,1

Links

Chai Wah Wu, Table of n, a(n) for n = 1..9998

Formula

a(n) = A078247(n)/n.

Prog

(Python)
def A096687(n):
    if n > 0:
        for i in range(1, 2**n):
            q, r = divmod(8*int(bin(i)[2:]), n)
            if not r:
                return q
    return 1 # Chai Wah Wu, Jan 02 2015

Crossrefs

Cf. A004290, A078241-A078248, A079339, A096681-A096688.

Sequence in context: A038282 A268482 A231234 * A326955 A381298 A199374

Adjacent sequences: A096684 A096685 A096686 * A096688 A096689 A096690

Keyword

base,nonn

Author

Ray Chandler, Jul 12 2004

Status

approved