A233262 Number of 7Xn 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabeled 6-colorings with no clashing color pairs).

6896, 8390656, 24461443072, 71328837140480, 222290692443996160, 702177183940808278016, 2242238966451009797226496, 7190233079434838637629407232, 23116065100534863987420040265728

Offset

1,1

Comments

Row 7 of A233256

Links

R. H. Hardin, Table of n, a(n) for n = 1..209

R. H. Hardin, Empirical recurrence of order 28

Formula

Empirical recurrence of order 28 (see link above)

Example

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

Crossrefs

Sequence in context: A184791 A184787 A233180 * A233245 A233223 A106768

Adjacent sequences: A233259 A233260 A233261 * A233263 A233264 A233265

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved