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A075215 Number of anisohedral polyhexes with n cells. 10


%S 0,0,0,0,0,1,4,36,73,258,501,999,1383,4835,4685,10576,8497,42156,

%T 12931,129325,84555

%N Number of anisohedral polyhexes 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/">Polyhex tiling</a>

%Y Cf. A070766, A075207, A075208, A075209, A075210, A075211, A075212, A075213, A075214, A075206, A075224.

%K hard,nonn

%O 1,7

%A _Joseph Myers_, Sep 08 2002

%E More terms from _Joseph Myers_, Nov 08 2003

%E More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007

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Last modified January 19 21:47 EST 2020. Contains 331066 sequences. (Running on oeis4.)