Domino Puzzle

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A domino is a 2 × 1 or 1 × 2 tile. Let XN be number of ways in which exactly n^2 dominoes can be placed without overlapping on a 2n × 2n chessboard so that every 2 × 2 square contains atleast two uncovered unit squares which lie in the same row or column. Input The first line of the input contains an integer T denoting the number of test cases. The description of T test cases follows Value of

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solution.cppC++17

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