A266057 Number of 3Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.

1, 35, 20, 302, 10310, 127492, 1590691, 20375630, 280811810, 3864301448, 50179179330, 655917215158, 8775960264661, 116907223558842, 1546866861474179, 20490542758690403, 271954342187521110, 3609318415540677192

Offset

1,2

Comments

Row 3 of A266055.

Links

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

R. H. Hardin, Empirical recurrence of order 94

Formula

Empirical recurrence of order 94 (see link above)

Example

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

Crossrefs

Cf. A266055.

Sequence in context: A033355 A267402 A217408 * A267341 A174027 A259083

Adjacent sequences: A266054 A266055 A266056 * A266058 A266059 A266060

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved