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a(1) = 1, a(n) = smallest multiple of a(n-1) (not equal to 10*a(n-1)) obtained by inserting digits anywhere in a(n-1).
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%I #5 Dec 05 2013 19:56:00

%S 1,11,121,12100,1210000,121000000,12100000000,1210000000000,

%T 121000000000000,12100000000000000,1210000000000000000,

%U 121000000000000000000,12100000000000000000000

%N a(1) = 1, 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. A080487, A080488, A080489, A080490, A080491, A080492, A080493, A080494.

%K base,nonn

%O 1,2

%A _Amarnath Murthy_, Mar 18 2003

%E Corrected and extended by _Frank Ellermann_, Jul 11 2003