A096685 Least k such that decimal representation of k*n contains only digits 0 and 6.

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

Author

Ray Chandler, Jul 12 2004

Keywords

• base
• nonn

Comments

k*n may comprise digits of 6 or both 0 and 6. - Harvey P. Dale, Dec 29 2013

Crossrefs

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

Programs

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 *)

Formula

a(n) = A078245(n)/n.