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A223302
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4X4X4 triangular graph coloring a rectangular array: number of nX5 0..9 arrays where 0..9 label nodes of a graph with edges 0,1 0,2 1,2 1,3 1,4 2,4 3,4 2,5 4,5 3,6 3,7 4,7 6,7 4,8 5,8 7,8 5,9 8,9 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph
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1
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2304, 298620, 46589268, 7442199324, 1208825525124, 195984333263964, 31982581839418764, 5198236290762699924, 848677490133585108996, 138037800797986968319404, 22532346060071398807282764
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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 n=3
..0..1..2..1..4....0..1..3..7..8....0..1..4..2..4....0..1..2..4..7
..1..2..5..4..2....1..2..1..4..5....1..0..2..4..2....1..2..4..3..4
..0..1..2..1..4....2..0..2..5..9....2..1..4..1..4....0..1..3..4..3
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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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