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a(1) = 5, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1). Also a(n) is not divisible by 10.
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%I #2 Dec 05 2013 19:55:59

%S 5,15,105,1155,10395,114345,1029105,11320155,101881395,1120695345,

%T 10086258105,110948839155,1220437230705,10983935076345,

%U 120823285839795,1087409572558155,11961505298139705,107653547683257345

%N a(1) = 5, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1). Also a(n) is not divisible by 10.

%Y Cf. A080445, A080446, A080447, A080448, A080450, A080451, A080452, A080453.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Feb 23 2003

%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003