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arxiv math/0605144 v1 pith:INVNEAOC submitted 2006-05-05 math.CO

Enumeration of generalized polyominoes

classification math.CO
keywords polyominoesenumerationgeneralizedgonsregularadditionallycomputerconnected
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As a generalization of polyominoes we consider edge-to-edge connected nonoverlapping unions of regular $k$-gons. For $n\le 4$ we determine formulas for the number $a_k(n)$ of generalized polyominoes consisting of $n$ regular $k$-gons. Additionally we give a table of the numbers $a_k(n)$ for small $k$ and $n$ obtained by computer enumeration. We finish with some open problems for $k$-polyominoes.

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