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A270071
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Number of tilings of an n X n square using monominoes and trominoes of any shape.
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3
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1, 1, 5, 93, 7517, 2501946, 3473827027, 19823918037604, 466326405037190729, 45283517791861200639757, 18137923612752525595542410804, 29967243098804386765778629249653298, 204247259656641635611144023845458294818885
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OFFSET
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0,3
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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