Catalogue of Unitary Polyominoes

Introduction

A polyomino is a figure made of equal squares joined edge to edge. A unitary polyomino is one whose edges all have length 1. If we color the cells of a unitary polyomino with red and black checks, all cells on each boundary will have the same color. In the example at the right, the cells on the outer boundary are all red, and the cells on the boundary of the hole are all black.

See also Catalogue of Almost Unitary Polyominoes.

Enumeration

Cells15891112 1314151617181920
Unitary
Polyominoes
A245620
1111223471017284769
Holeless Unitary
Polyominoes
A245660
111121245412132029

1 Cell

5 Cells

8 Cells

9 Cells

11 Cells

12 Cells

13 Cells

14 Cells

15 Cells

16 Cells

17 Cells

18 Cells

19 Cells

20 Cells

Last revised 2014-07-29.


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Col. George Sicherman [ HOME | MAIL ]