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a(1) = 2, a(n+1) = smallest multiple of a(n) using only prime digits (2,3,5,7).
3

%I #6 Dec 05 2013 19:55:57

%S 2,22,352,23232,255552,23255232,232575575232,22327255222272,

%T 33575272735753772255232

%N a(1) = 2, a(n+1) = smallest multiple of a(n) using only prime digits (2,3,5,7).

%C Sequence is infinite - see Comments in A078233. - Fung Cheok Yin (cheokyin_restart(AT)yahoo.com.hk), Sep 02 2006

%Y Cf. A078233, A078234, A078235, A078236.

%K base,more,nonn

%O 1,1

%A _Amarnath Murthy_, Nov 23 2002

%E More terms from _Sascha Kurz_, Jan 06 2003