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Polyomino Enumeration
K. S. Brown examines the number of polyominoes up to order 12 for various cases involving rotation or reflections. Equations linking the cases are proposed.
http://www.mathpages.com/home/kmath039.htm
Mathpages.com ~
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Polyominoes
Introduction to Tetrominoes, Pentominoes, Hexominoes, Heptominoes, Octominoes, Fixed (translation only) Polyominoes. Numerous Links.
http://www.geocities.com/alclarke0/PolyPages/Polyominoes.html
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Primes of a 14-omino
Michael Reid shows that a 3x6 rectangle with a 2x2 bite removed can tile a (much larger) rectangle. It is open whether it can do this using an odd number of copies.
http://www.math.ucf.edu/~reid/Polyomino/14omino02_rect.html
Ucf.edu ~
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