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A208782
Number of nX2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any antidiagonal neighbor (colorings ignoring permutations of colors)
1
2, 10, 114, 2066, 52922, 1788850, 76282138, 3974779402, 247083681522, 17984917069018, 1510073008031682, 144466325466945282, 15586227681748183978, 1879836370194918728834, 251554605154723467929962
OFFSET
1,1
COMMENTS
Column 2 of A208788
LINKS
EXAMPLE
Some solutions for n=4
..0..0....0..0....0..0....0..1....0..0....0..0....0..0....0..0....0..0....0..0
..1..0....1..1....1..0....2..0....1..1....1..2....1..1....1..0....1..0....1..0
..1..0....0..0....1..1....1..2....2..0....0..0....2..0....1..2....1..0....1..2
..1..2....1..0....0..0....0..0....2..0....2..1....1..1....0..3....1..1....0..0
CROSSREFS
Sequence in context: A226300 A223056 A377552 * A237749 A113089 A054928
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved