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%I #12 Dec 05 2014 03:04:56
%S 1,1,2,5,12,35,101,320,961,2703,6174,19905,35060,94614,235381,467754,
%T 776873,2498766,3281990,9917824,18735749,33417839,52251279,181365462,
%U 239569893
%N Number of polyominoes with n cells that tile the plane by translation or 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, A075200, A075201, A075202, A075204, A075205, A075206, A075212, A075221.
%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
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