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.

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

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A078236, A078237.

Sequence in context: A196487 A262540 A265203 * A080494 A077710 A088780

Adjacent sequences: A078235 A078236 A078237 * A078239 A078240 A078241

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