Pentahex Tri-Oddities
A pentahex tri-oddity
is a figure with ternary symmetry formed by some number of copies of
a pentahex that is not a multiple of three.
Here are the minimal known tri-oddities for pentahexes,
along with holeless variants and mirror-symmetric tri-oddities.
They are not necessarily uniquely minimal.
Please write if you find a smaller solution or solve an unsolved case.
See also:
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Last revised 2026-07-04.
Back to Polyform Oddities
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Col. George Sicherman
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