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A075201 Number of polyominoes with n cells that tile the plane by 180-degree rotation (Conway criterion) but not by translation. 10

%I #12 Dec 05 2014 03:05:24

%S 0,0,0,0,3,11,60,199,748,2181,5391,17193,31881,85942,218760,430339,

%T 728315,2344106,3096983,9344528,17859116,31658109,49644736,172596719,

%U 228795554

%N Number of polyominoes with n cells that tile the plane by 180-degree rotation (Conway criterion) but not by translation.

%D Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.

%H Joseph Myers, <a href="http://www.polyomino.org.uk/mathematics/polyform-tiling/">Polyomino tiling</a>

%Y Cf. A054359, A075198, A075199, A075200, A075202, A075203, A075204, A075205, A075206, A075210, A075219.

%K hard,nonn

%O 1,5

%A _Joseph Myers_, Sep 08 2002

%E More terms from _Joseph Myers_, Nov 04 2003

%E a(24) and a(25) from _Joseph Myers_, Nov 17 2010

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Last modified April 25 16:23 EDT 2024. Contains 371989 sequences. (Running on oeis4.)