Catalogue of Almost Unitary Polyominoes


A polyomino is a figure made of equal squares joined edge to edge. A unitary polyomino is one whose edges all have length 1; see Catalogue of Unitary Polyominoes. An almost unitary polyomino has just one edge of length greater than 1.

See also the Catalogue of Almost Almost Unitary Polyominoes.


Cells4789101112 131415161718
Almost Unitary
1221691121 4969117249427

The shaded values were found by John Mason in 2023.

4 Cells

7 Cells

8 Cells

9 Cells

10 Cells

11 Cells

12 Cells

13 Cells

Last revised 2023-05-01.

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Col. George Sicherman [ HOME | MAIL ]