A197240 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,2 for x=0,1,2,3,4

1, 37, 507, 6284, 89527, 1209990, 16248436, 220537819, 2991520965, 40512793371, 548735832406, 7434530776423, 100724219721520, 1364590772374292, 18486981607134199, 250455940483033208, 3393127984714324346

Offset

1,2

Comments

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

Column 6 of A197242

Links

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

Example

Some solutions containing all values 0 to 4 for n=4
..0..0..0..0..2..2....1..3..1..0..0..0....2..2..2..0..0..0....0..0..2..2..2..0
..2..2..2..0..2..2....0..1..0..2..2..2....2..4..2..0..0..0....0..0..2..4..2..2
..2..4..2..1..3..1....0..0..0..2..4..2....2..2..2..1..3..1....0..1..2..2..0..2
..2..2..2..0..1..0....0..0..0..2..2..2....0..0..0..0..1..0....1..3..1..2..2..2

Crossrefs

Sequence in context: A086025 A197215 A264419 * A220331 A142764 A256811

Adjacent sequences: A197237 A197238 A197239 * A197241 A197242 A197243

Keyword

nonn

Author

R. H. Hardin Oct 12 2011

Status

approved