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A226980
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Number of ways to cut an n X n square into squares with integer sides, reduced for symmetry, where the orbits under the symmetry group of the square, D4, have 4 elements.
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8
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0, 0, 1, 6, 26, 264, 1157, 23460, 153485, 6748424, 70521609, 6791578258
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OFFSET
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1,4
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LINKS
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FORMULA
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EXAMPLE
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For n=5, there are 26 dissections where the orbits under the symmetry group of the square, D4, have 4 elements.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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a(8)-a(12) from Ed Wynn, Apr 01 2014
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STATUS
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approved
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