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A302223
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Number of nX7 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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8, 1934, 15569, 251254, 3018243, 42508145, 553097760, 7403262824, 97939043966, 1301831347709, 17275065368012, 229303687769069, 3043569120232324, 40395942785616147, 536209245725631300, 7116991167351864042
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