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A172763
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Number of 3*n X n 0..3 arrays with row sums 3 and column sums 9.
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1
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1, 580, 19546975, 11012437532800, 53461314050652508000, 1482500191777802616831698000, 177485739636656023698217362159890000, 74896615128945574656737417426177604440960000
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