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A280959
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Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
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1
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82, 4850, 63085, 1121528, 20029500, 346289502, 6052621154, 105777297118, 1846875100200, 32253949107668, 563278827019060, 9836989060923111, 171791531487108414, 3000138481060751984, 52393917402743354484
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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..0..1..2..1. .0..1..0..1..0..2. .0..1..0..0..2..2. .0..1..0..1..1..0
..2..0..1..0..2..1. .1..0..1..2..0..1. .2..1..2..1..0..1. .2..1..2..2..0..2
..1..2..0..1..0..0. .2..2..0..2..1..2. .0..2..1..2..2..1. .0..0..1..1..2..1
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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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