A197203 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4

3, 47, 588, 7073, 82408, 977946, 11746093, 140398339, 1673987573, 19978425920, 238603437585, 2848944091708, 34010711969738, 406045052968057, 4847874016932633, 57879103635687885, 691015526016683752

Offset

1,1

Comments

Every 0 is next to 0 4's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 3's

Column 4 of A197207

Links

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

Example

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

Crossrefs

Sequence in context: A247024 A137611 A199106 * A197801 A239450 A187665

Adjacent sequences: A197200 A197201 A197202 * A197204 A197205 A197206

Keyword

nonn

Author

R. H. Hardin Oct 11 2011

Status

approved