A266855 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0.

2, 6, 44, 438, 4156, 49033, 588632, 8351513, 113609298, 1770032098, 26096782411, 426735882363, 6595598937191, 110427559297288, 1759795259815468, 29843750451187538, 485812231474336419, 8302508424244712407

Offset

1,1

Comments

Row 4 of A266854.

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Cf. A266854.

Sequence in context: A120594 A038180 A058925 * A332074 A171690 A259763

Adjacent sequences: A266852 A266853 A266854 * A266856 A266857 A266858

Keyword

nonn

Author

R. H. Hardin, Jan 04 2016

Status

approved