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A208095
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Number of n X 5 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).
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2
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1, 15, 7239, 34438557, 677352910013, 37155328943771767, 4558466722941178786343, 1086389216314310418981064791, 455984828225593734632397603864943, 313575182393219205765164919469780819082, 334231574923251058616578365205688685770273545
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OFFSET
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0,2
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..1..2..0..1....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0
..0..1..2..0..1....0..1..0..1..0....0..2..0..1..0....0..1..0..1..0
..0..1..2..0..1....2..1..0..1..0....0..1..0..1..0....0..1..0..1..0
..0..1..2..3..1....0..1..0..1..0....0..3..0..1..0....0..1..0..1..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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EXTENSIONS
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a(0)=1 prepended and terms a(6) and beyond from Andrew Howroyd, May 17 2020
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STATUS
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approved
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