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Number of polyominoes with n cells that tile the plane both by translation and by 180-degree rotation (Conway criterion).
10

%I #12 Dec 05 2014 03:01:49

%S 1,1,2,5,9,24,41,121,212,520,773,2577,3037,8081,13954,32124,41695,

%T 118784,150188,411484,604304,1305265,1954823,5326890,7331606

%N Number of polyominoes with n cells that tile the plane both by translation and by 180-degree rotation (Conway criterion).

%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, A075201, A075202, A075203, A075204, A075205, A075206, A075209, A075218.

%K hard,nonn

%O 1,3

%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