A266017 Number of 7 X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors equal to itself.

1, 1, 102, 44, 483, 1561, 10708, 62684, 145344, 253394, 1663567, 7253158, 20436396, 81005594, 346203546, 1298613540, 4729960051, 18275111422, 70440272974, 267189128408, 1008549687107, 3827029447559, 14623357809480, 55686510400311

Offset

1,3

Comments

Row 7 of A266012.

Links

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

Example

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

Crossrefs

Cf. A266012.

Sequence in context: A325775 A204749 A244949 * A144469 A009101 A031962

Adjacent sequences: A266014 A266015 A266016 * A266018 A266019 A266020

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved