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A133413
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Half the number of ways of placing up to n^2 pawns on an n x n chessboard so that it balances at its midpoint.
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1
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1, 2, 24, 492, 202064, 100202536, 888531141152, 8548846756027594, 1400822035743239844640, 241149984205773848119833656, 691305758149247080625180837349904
(list; graph; refs; listen; history; internal format)
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