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A283693
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Number of 3Xn 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.
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1
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8, 57, 264, 1521, 8687, 47829, 268285, 1503392, 8399236, 46998162, 262952663, 1470846540, 8228361722, 46031489681, 257506370211, 1440540994224, 8058660343663, 45081605428482, 252194893203897, 1410825055629845
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