The labyrinth of
polyominoes
intro
catalog
symmetry
classes
packing
tiling
genealogy
glossary
links
small polyominoes
rectangle
square
pentominoes
rectangle
square
hexominoes
rectangle
square
heptominoes
rectangle
square
octominoes
rectangle
square
Polyominoes: Puzzles, Patterns, Problems, and Packings - Revised and expanded second edition
by Solomon Golomb: 7, Figure 11