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A280360
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Number of nX5 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors and with new values introduced in order 0 sequentially upwards.
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1
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30, 1617, 78800, 3992071, 201054068, 10144351660, 511688896140, 25812250379197, 1302084964081326, 65683250595897258, 3313367690989159234, 167141663155726686922, 8431401872254944607810, 425319079112261667548370
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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. .0..1..2..0..0. .0..1..2..1..0. .0..1..2..0..1
..0..2..2..0..1. .2..0..1..2..1. .2..0..1..2..1. .2..0..1..2..0
..1..1..0..2..2. .1..0..2..0..0. .1..1..2..0..0. .1..2..1..0..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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