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A302221
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Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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3, 146, 760, 6110, 40395, 292781, 2043848, 14419536, 101511446, 713030990, 5019470018, 35283108018, 248180957058, 1745222920651, 12274305388046, 86321053540385, 607085317234430, 4269538885720366, 30026989609915629
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