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A269897
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Number of n X 3 0..6 arrays with some element plus some horizontally or vertically adjacent neighbor totalling six exactly once.
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1
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84, 45360, 12377400, 2801265390, 579818225700, 113873466835170, 21603218450171400, 3998999827651729950, 726818744373948859500, 130236638797904930468730, 23073817637719546502490000
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