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A146300
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Number of n X n arrays of squares of integers summing to 9 with every element equal to at least one neighbor.
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1
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0, 1, 1640, 123744, 1546356, 9282128, 37896264, 121782952, 331901924, 801191922, 1761200680, 3592793804, 6894127812, 12569395174
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