A197087 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4

1, 26, 422, 5101, 71867, 939690, 12635748, 168802858, 2257145231, 30181119596, 403549336200, 5395982997113, 72149973349274, 964732771720273, 12899599151591706, 172482705147134597, 2306295510150788549

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 0's, every 4 is next to 4 1's

Column 5 of A197090

Links

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

Example

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

Crossrefs

Sequence in context: A125483 A229025 A357889 * A028165 A218896 A028131

Adjacent sequences: A197084 A197085 A197086 * A197088 A197089 A197090

Keyword

nonn

Author

R. H. Hardin Oct 10 2011

Status

approved