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A075206 Number of anisohedral polyominoes with n cells. 10


%S 0,0,0,0,0,0,0,1,9,44,108,222,431,900,1157,2258,1381,7429,5542,18306,

%T 22067,47849,10542,202169,28977

%N Number of anisohedral polyominoes with n cells.

%C 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 Branko Gr├╝nbaum 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, A075203, A075204, A075205, A075215, A075224.

%K hard,nonn

%O 1,9

%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 June 5 12:47 EDT 2020. Contains 334840 sequences. (Running on oeis4.)