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A232310
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Number of (n+1)X(n+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero
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1
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2, 24, 1202, 231454, 161243887, 400571676322, 3587649343841650, 115662789623304964655, 13420410026776778616974635, 5604396268950285334109397116334, 8423557107575828118320152665611119144
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