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A208414
Number of 7Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors
2
715, 11188907, 166729574522, 2505261257850802, 37620564383817645696, 564960990903273888822194, 8484183047877022205116428184, 127409472349221599855304406138354, 1913345483596257045380656751266037942
OFFSET
1,1
COMMENTS
Row 7 of A208408
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..2....0..1..1..2....0..1..0..0....0..0..0..1....0..0..0..0
..1..1..3..2....0..1..0..0....1..0..1..2....0..1..0..1....1..0..2..2
..0..3..3..0....0..0..3..0....1..1..0..0....0..2..2..1....0..2..3..1
..1..3..2..1....1..1..2..0....3..1..3..0....1..2..2..0....1..0..1..1
..1..2..1..1....2..2..1..0....1..0..1..3....1..3..1..3....2..2..1..0
..0..2..0..3....3..2..2..0....2..3..1..3....1..0..3..3....0..3..0..0
..0..0..2..1....2..3..3..0....2..2..1..1....3..2..1..3....1..1..1..3
CROSSREFS
Sequence in context: A200800 A208200 A208407 * A214237 A252467 A233629
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 26 2012
STATUS
approved