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A080494
a(1) =9, a(n) = smallest multiple of a(n-1) (not equal to 10*a(n-1)) obtained by inserting digits anywhere in a(n-1).
8
9, 99, 9009, 900900, 90090000, 9009000000, 900900000000, 90090000000000, 9009000000000000, 900900000000000000, 90090000000000000000, 9009000000000000000000, 900900000000000000000000
OFFSET
1,1
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Mar 18 2003
EXTENSIONS
Corrected and extended by Ray Chandler, Oct 11 2003
STATUS
approved