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A222851
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Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order
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1
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10, 391, 19446, 1020085, 54792022, 2987881000, 164730750373, 9157731030542, 512408255461283, 28820435495127238, 1627922121827975600, 92280373332999109832, 5246771020310646443594, 299086443047065736686909
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