A266058 Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.

1, 176, 54, 4203, 624720, 14337385, 454759923, 21604580859, 889621457229, 33237230186321, 1314156961424515, 52670841452643068, 2069568617113158340, 81449577335786082237, 3221788440314018526529, 127237760114049369621749

Offset

1,2

Comments

Row 4 of A266055.

Links

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

Example

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

Crossrefs

Cf. A266055.

Sequence in context: A212946 A172685 A344280 * A261678 A136603 A114824

Adjacent sequences: A266055 A266056 A266057 * A266059 A266060 A266061

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved