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A208100
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Number of 5 X n 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, 52, 10900, 43366459, 746823293346, 37155328943771767, 4226534204353128532380, 947741983969338430602294081, 378161752496622695975714927056844, 249107761813131722624691729833262083766, 255811781476365074058962776043470702114960079
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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..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1
..0..1..2..1....0..2..0..1....0..1..0..1....0..1..0..1....0..1..0..1
..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....2..1..0..3
..0..1..0..1....0..2..0..1....0..1..0..1....0..1..2..1....0..1..0..1
..3..1..0..1....0..1..3..1....0..1..0..1....0..1..0..1....0..3..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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EXTENSIONS
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a(0)=1 prepended and terms a(6) and beyond from Andrew Howroyd, May 18 2020
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STATUS
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approved
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