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A096688
Least k such that decimal representation of k*n contains only digits 0 and 9.
19
9, 45, 3, 225, 18, 15, 1287, 1125, 1, 9, 9, 75, 693, 6435, 6, 5625, 5877, 5, 5211, 45, 429, 45, 43083, 375, 36, 3465, 37, 32175, 341721, 3, 32229, 28125, 3, 29385, 2574, 25, 27, 26055, 231, 225, 2439, 2145, 230463, 225, 2, 215415, 1917, 1875, 202041, 18, 1959
OFFSET
1,1
FORMULA
a(n) = A078248(n)/n.
KEYWORD
base,nonn
AUTHOR
Ray Chandler, Jul 12 2004
STATUS
approved