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A208298
Number of nX4 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or antidiagonal neighbor (colorings ignoring permutations of colors)
2
5, 602, 373780, 656404264, 2475181138384, 17131843186425504, 196551307092757144384, 3478554309451804194287232, 90015726535715347904300537088, 3267494997828691666636390741293568
OFFSET
1,1
COMMENTS
Column 4 of A208301
LINKS
EXAMPLE
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..0..1....0..1..0..2....0..1..0..1....0..1..0..1....2..1..0..1
..2..1..0..2....2..1..0..1....2..1..0..1....0..1..0..1....0..2..0..1
..0..1..0..1....0..1..0..2....0..1..0..1....2..3..0..1....0..1..0..1
CROSSREFS
Sequence in context: A302379 A303100 A302951 * A216077 A297949 A298558
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2012
STATUS
approved