There are 251 non-repeating patterns.

These can be conveniently divided into three further groups.The first group are those tilings of a rectangle by polyominoes, and two examples of which are:

There are a total of 110 such polyominoes, being 43% of the total. There are no more choices to be made. For a tabulation of their properties, see Polyominoes.

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The second group are those tilings which has a spiral appearance, and two examples of which are:

There are a total of 29 such spiral tilings, being 11% of the total. There are no more choices to be made.

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The last group are those which are neither of the above two groups. The number of such patterns in 112, being 44% of the total. Two examples of such patterns are:

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