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)

2, 10, 114, 2066, 52922, 1788850, 76282138, 3974779402, 247083681522, 17984917069018, 1510073008031682, 144466325466945282, 15586227681748183978, 1879836370194918728834, 251554605154723467929962

Offset

1,1

Comments

Column 2 of A208788

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

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: A317342 A226300 A223056 * A237749 A113089 A054928

Adjacent sequences: A208779 A208780 A208781 * A208783 A208784 A208785

Keyword

nonn

Author

R. H. Hardin Mar 01 2012

Status

approved