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A187280
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Number of (n+2) X 3 0..2 arrays with every 2 X 2 subblock sum equal to some diagonal or antidiagonal neighbor 2 X 2 subblock sum.
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1
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711, 859, 20529, 79499, 868277, 5031413, 43307435, 292250165, 2308333343, 16530790801, 126385412189, 927198993151, 6998506191721, 51873562337879, 389498512776673, 2900304246591069, 21729379461164643, 162152529828908201
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