A233245 Number of 7Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

6896, 53692063, 633724470764, 7415057313896849, 86961450397919224924, 1019972250198681748495759, 11963921132630138069523033663, 140334092336070663237513533114112, 1646091578322294419786739964245190052

Offset

1,1

Comments

Row 7 of A233239

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=2
..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0
..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0
..0..1....0..1....0..0....0..1....0..1....0..0....0..0....0..1....0..1....0..1
..2..0....0..0....1..1....2..1....1..0....0..1....0..1....1..2....0..4....2..0
..4..0....1..2....5..5....0..4....2..2....2..4....2..4....1..0....2..4....0..1
..2..5....5..2....5..1....4..4....0..1....0..0....0..4....4..5....0..0....3..4
..1..1....4..3....2..1....2..2....2..2....3..1....4..2....2..2....3..4....3..1

Crossrefs

Sequence in context: A184787 A233180 A233262 * A233223 A106768 A156419

Adjacent sequences: A233242 A233243 A233244 * A233246 A233247 A233248

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved