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

715, 11188907, 166729574522, 2505261257850802, 37620564383817645696, 564960990903273888822194, 8484183047877022205116428184, 127409472349221599855304406138354, 1913345483596257045380656751266037942

Offset

1,1

Comments

Row 7 of A208408

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

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

Adjacent sequences: A208411 A208412 A208413 * A208415 A208416 A208417

Keyword

nonn

Author

R. H. Hardin Feb 26 2012

Status

approved