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A078238
a(1) = 9, a(n+1) = smallest multiple of a(n) using only composite digits (4,6,8,9,0) and is not divisible by 10.
2
9, 99, 9009, 99099, 44990946, 494900406, 4688686446444, 404989980498046944, 44090684496040044064666464, 88060080898094990484996406446844608
OFFSET
1,1
COMMENTS
Sequence is infinite: the concatenation of two a(n)'s is an upper bound for a(n+1). - Sascha Kurz, Jan 04 2003
CROSSREFS
Sequence in context: A196487 A262540 A265203 * A080494 A077710 A088780
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 23 2002
EXTENSIONS
a(9) from Robert Gerbicz, May 09 2008
a(10) from Donovan Johnson, Sep 05 2008
STATUS
approved