Search: id:A016070
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%I A016070
%S A016070 4,5,6,7,8,9,11,12,15,21,22,26,38,88,109,173,212,235,264,3114,81619
%N A016070 Numbers n such that n^2 contains exactly 2 different digits, excluding 
               10^m, 2*10^m, 3*10^m.
%D A016070 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 109, p. 38, Ellipses, 
               Paris 2008.
%D A016070 R. K. Guy, Unsolved Problems in Number Theory, F24.
%H A016070 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SquareNumber.html">Link to a section of The World of Mathematics.</
               a>
%Y A016070 Cf. A016069, A018884, A018885.
%Y A016070 Sequence in context: A030791 A039091 A120181 this_sequence A047569 A039062 
               A067187
%Y A016070 Adjacent sequences: A016067 A016068 A016069 this_sequence A016071 A016072 
               A016073
%K A016070 nonn,nice,base
%O A016070 1,1
%A A016070 Robert G. Wilson v (rgwv(AT)rgwv.com)
%E A016070 Next term if it exists is bigger than 9*10^7 - Michel ten Voorde (seqfan(AT)tenvoorde.org) 
               Apr 12 2001
%E A016070 Next term if it exists is bigger than 8.8*10^9 - Paul.Jobling(AT)WhiteCross.com, 
               Jun 10 2002

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