Heptomino Oddities

A polyomino oddity is a symmetrical figure formed by an odd number of copies of a polyomino. Here are the minimal known oddities with various symmetries for the 108 heptominoes. Many were found by Mike Reid.

For pentominoes, see Pentomino Oddities. For hexominoes, see Hexomino Oddities.

Lateral

Unsolved

Impossible

Diagonal

Unsolved

Impossible

Birotary

Unsolved

Impossible

Double Lateral

Double Diagonal

Quaternary Rotary

Full

Last revised 2011-10-08.

Back to Polyform Curiosities.
Col. George Sicherman [ HOME | MAIL ]