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%I #6 Mar 09 2015 09:35:19
%S 1,3,7,19,21,27,31,39,49,57,61,67,85,91,93,99,109,111,121,123,133,153,
%T 163,171,175,183,187,199,213,223,229,235,243,259,261,289,297,301,307,
%U 313,325,339,351,355,363,381,403,405,409,411,427,433,439
%N Digit '3' concatenated with a(n) is a lucky number.
%Y Cf. A000959.
%K nonn,base,less
%O 1,2
%A _Patrick De Geest_, May 15 1998
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