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A194928
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Number of lower triangles of an n X n 0..5 array with no element differing from any of its horizontal or vertical neighbors by more than one
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1
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6, 44, 728, 26316, 2089736, 364130672, 139323386328, 117075649276412, 216113470259526948, 876452156097264185188, 7810016810149997712089700, 152927733637636192107728580088, 6580461097392848372314889891440304
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for 4X4
..3........2........1........4........5........4........3........2
..4.4......1.2......2.1......3.2......4.4......5.4......4.3......1.1
..4.3.2....1.1.0....3.2.2....3.2.3....5.5.5....4.3.3....3.3.2....0.1.0
..3.2.1.1..1.0.0.0..2.1.1.1..3.3.3.2..4.4.4.3..4.3.4.5..4.3.3.4..1.0.0.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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