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A096685
Least k such that decimal representation of k*n contains only digits 0 and 6.
2
6, 3, 2, 15, 12, 1, 858, 75, 74, 6, 6, 5, 462, 429, 4, 375, 3918, 37, 3474, 3, 286, 3, 28722, 25, 24, 231, 24691358, 2145, 227814, 2, 21486, 1875, 2, 1959, 1716, 185, 18, 1737, 154, 15, 1626, 143, 153642, 15, 148, 14361, 1278, 125, 134694, 12, 1306, 1155
OFFSET
1,1
COMMENTS
k*n may comprise digits of 6 or both 0 and 6. - Harvey P. Dale, Dec 29 2013
FORMULA
a(n) = A078245(n)/n.
MATHEMATICA
k06[n_]:=Module[{k=1}, While[Max[Drop[DigitCount[k*n], {6, 10, 4}]]>0, k++]; k]; Array[k06, 52] (* Harvey P. Dale, Dec 29 2013 *)
KEYWORD
base,nonn
AUTHOR
Ray Chandler, Jul 12 2004
STATUS
approved