A268144 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to at least one diagonal or antidiagonal neighbor and the top left element equal to 0.

0, 6, 6, 672, 4734, 177048, 4131792, 132137160, 4330697670, 144754955796

Offset

1,2

Comments

Row 4 of A268142.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A268142.

Sequence in context: A165641 A213149 A267727 * A113550 A370738 A221400

Adjacent sequences: A268141 A268142 A268143 * A268145 A268146 A268147

Keyword

nonn

Author

R. H. Hardin, Jan 27 2016

Status

approved