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A197660
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Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,6,6,3,0,5,0 for x=0,1,2,3,4,5,6
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0
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1, 1, 4, 19, 116, 1109, 15390, 312785, 9410767, 416753642, 27195802437, 2617717241482, 371516018279032, 77760873988114592
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OFFSET
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1,3
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COMMENTS
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Every 0 is next to 0 3's, every 1 is next to 1 6's, every 2 is next to 2 6's, every 3 is next to 3 3's, every 4 is next to 4 0's, every 5 is next to 5 5's, every 6 is next to 6 0's
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LINKS
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EXAMPLE
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Some solutions for 5X5X5
......0..........0..........0..........0..........0..........0..........0
.....0.0........0.0........0.0........4.0........0.4........0.4........0.4
....4.0.0......0.6.0......0.0.0......0.0.4......0.0.0......0.0.0......4.0.0
...0.0.0.0....0.0.0.0....0.0.0.4....0.0.0.0....0.0.6.0....4.0.0.0....0.0.0.0
..0.0.0.4.0..0.0.0.4.0..0.0.4.0.0..0.4.0.4.0..0.4.0.0.0..0.0.0.4.0..0.0.0.4.0
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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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