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

One-Sided

Holeless Variant

Heptiamonds

Holeless Variants

One-Sided

Enneiamonds

Last revised 2012-07-17.


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Col. George Sicherman [ HOME | MAIL ]