A078247 -id:A078247 - cp's OEIS frontend

A204095 Numbers whose base 10 digits are a subset of {0, 8}.

0, 8, 80, 88, 800, 808, 880, 888, 8000, 8008, 8080, 8088, 8800, 8808, 8880, 8888, 80000, 80008, 80080, 80088, 80800, 80808, 80880, 80888, 88000, 88008, 88080, 88088, 88800, 88808, 88880, 88888, 800000, 800008, 800080, 800088, 800800, 800808, 800880, 800888

Offset: 0

Reinhard Zumkeller, Jan 10 2012

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Cf. A078247, A169965, A169966, A169967, A169964, A204093, A204094, A097256.

a204095 n = a204095_list !! n
a204095_list = map (* 8) a007088_list

f:= proc(n) local L; L:= convert(n,base,2); add(8*L[i]*10^(i-1),i=1..nops(L)) end proc:
seq(f(n),n=0..100); # Robert Israel, Jul 28 2014

Table[8 FromDigits[IntegerDigits[n, 2]], {n, 0, 39}] (* Alonso del Arte, Jan 10 2012 *)

a(n)=8*subst(Pol(binary(n)), x, 10);
for(n=0, 20, print1(a(n), ", ")) \\ Felix Fröhlich, Jul 26 2014

a(n) = 8 * A007088(n).

Definition corrected by M. F. Hasler, Feb 08 2020

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

Original entry on oeis.org

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

Ray Chandler, Jul 12 2004

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

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

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

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

cp's OEIS Frontend

A204095 Numbers whose base 10 digits are a subset of {0, 8}.

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