Pentiamond, Heptiamond, and Enneiamond Oddities
An oddity
is a figure with binary symmetry formed by an odd number of copies of
a polyform.
Here are the minimal known oddities for pentiamonds, heptiamonds,
and enneiamonds.
Please write if you find a smaller solution or solve an unsolved case.
For hexiamonds, see
Hexiamond Oddities.
For octiamonds, see
Octiamond Oddities.
Pentiamonds
Convex Variant
This tiling has 61 tiles.
One-Sided
Holeless Variant
Heptiamonds
Holeless Variants
One-Sided
Enneiamonds
Last revised 2024-06-07.
Back to Polyform Oddities
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Polyform Curiosities
Col. George Sicherman
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