Search: id:A075204
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%I A075204
%S A075204 0,0,0,0,0,0,3,22,80,323,338,3322,3178,13590,43045,76881,48781,551137,
%T A075204 93592,2190553,3163376,3542450,1065943
%N A075204 Number of polyominoes with n cells that tile the plane isohedrally but 
               not by translation or by 180-degree rotation (Conway criterion).
%C A075204 A tiling is isohedral if the symmetries of the tiling act transitively 
               on the tiles; a shape is anisohedral if it tiles the plane, but not 
               isohedrally.
%D A075204 Branko Gruenbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, 
               New York, 1987, Section 9.4.
%H A075204 Joseph Myers, <a href="http://www.srcf.ucam.org/~jsm28/tiling/">Polyomino 
               tiling</a>
%Y A075204 Cf. A054359, A075198, A075199, A075200, A075201, A075202, A075203, A075205, 
               A075206, A075213, A075222.
%Y A075204 Sequence in context: A005288 A143166 A055550 this_sequence A106150 A135836 
               A004305
%Y A075204 Adjacent sequences: A075201 A075202 A075203 this_sequence A075205 A075206 
               A075207
%K A075204 hard,nonn
%O A075204 1,7
%A A075204 Joseph Myers (jsm(AT)polyomino.org.uk), Sep 08 2002
%E A075204 More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Nov 04 2003

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