A080494 - OEIS

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).

%I #5 Dec 05 2013 19:56:00

%S 9,99,9009,900900,90090000,9009000000,900900000000,90090000000000,

%T 9009000000000000,900900000000000000,90090000000000000000,

%U 9009000000000000000000,900900000000000000000000

%N 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).

%Y Cf. A080486, A080487, A080488, A080489, A080490, A080491, A080492, A080493.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Mar 18 2003

%E Corrected and extended by _Ray Chandler_, Oct 11 2003