Pentomino Oddities

A polyomino oddity is a symmetrical figure formed by an odd number of copies of a polyomino. Here are the minimal known oddities and extended oddities for the 12 pentominoes, as found mostly by Mike Reid and me. Click on the blue figures to expand them.

For hexominoes, see Hexomino Oddities.

LateralDiagonalRotaryDouble
Lateral		Double
Diagonal		Double
Rotary		Full
3
5

Mike Reid 		7

George Sicherman 		9

George Sicherman 		15

George Sicherman 		17

Mike Reid 		21

Mike Reid
1
5
1
1
5
5
5
7

Mike Reid 		5

Mike Reid 		7

George Sicherman 		11

George Sicherman 		13

George Sicherman 		13

Mike Reid 		21

Mike Reid
7

Mike Reid 		5

Mike Reid 		9

Mike Reid 		15

George Sicherman 		15

Mike Reid 		21

George Sicherman 		29

Mike Reid
3
3
5
9

Mike Reid 		7

Torsten Sillke 		9

Torsten Sillke 		13

Mike Reid
1
19

George Sicherman 		23

Mike Reid 		47

Mike Reid 		     
1
13

George Sicherman 		19

George Sicherman 		19

George Sicherman 		     
11

George Sicherman 		1
15

George Sicherman 		    73

George Sicherman 		 
7

George Sicherman 		1
9

George Sicherman 		21

Mike Reid 		11

George Sicherman 		25

George Sicherman 		29

George Sicherman
1
1
1
1
1
1
1
5

George Sicherman 		7

George Sicherman 		7

Mike Reid 		13

George Sicherman 		17

Mike Reid 		17

Mike Reid 		29

Mike Reid
9

George Sicherman 		13

George Sicherman 		1
9

George Sicherman 		13

George Sicherman 		13

George Sicherman 		 

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