%I A119909
%S A119909 1,2,4,5,7,22,43,131,394
%N A119909 Numbers n such that n and n^2 written in base 3 are zero-free.
%C A119909 No more terms < 3^20. - Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), 
               Jun 05 2006
%e A119909 n: 1, 2, 4, 5, 7, 22, 43, 131, 394
%e A119909 n^2: 1, 4, 16, 25, 49, 484, 1849, 17161, 155236
%e A119909 n written in base 3: 1, 2, 11, 12, 21, 211, 1121, 11212, 112121
%e A119909 n^2 written in base 3: 1,11,121,221,1211,122221,2112111,212112121,21212221111
%Y A119909 Sequence in context: A127791 A005620 A049915 this_sequence A097698 A101410 
               A110991
%Y A119909 Adjacent sequences: A119906 A119907 A119908 this_sequence A119910 A119911 
               A119912
%K A119909 base,more,nonn
%O A119909 1,2
%A A119909 Zak Seidov (zakseidov(AT)yahoo.com), May 28 2006