A197549 Number of free poly-IH10-tiles (holes allowed) with n cells.

1, 1, 5, 16, 62, 276, 1222, 5563, 25805, 120909, 572011, 2727485, 13089106, 63164265

Offset: 1

Author

Joseph Myers, Oct 16 2011

Keywords

• hard
• nonn

Comments

Equivalently, polyhexes where two polyhexes are considered equivalent if and only if they are related by a translation or a rotation of order 3.

References

• Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 6.2 and 9.4.

Crossrefs

Cf. A000228, A001207, A006535, A057973, A197550, A197551, A197552, A197553, A197554.