A197801 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,1 for x=0,1,2,3,4

3, 47, 596, 7185, 84258, 1003304, 12108247, 145415587, 1741678883, 20881671948, 250537144927, 3005211136420, 36041194655182, 432263935701095, 5184637079331635, 62184399037504325, 745829859698448162

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 1's

Column 4 of A197805

Links

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

Example

Some solutions containing all values 0 to 4 for n=5
..0..3..0..1....0..1..2..0....0..2..1..0....0..0..3..0....0..0..0..0
..0..0..1..2....1..4..1..1....1..1..4..1....2..1..0..1....0..3..0..3
..2..1..1..2....2..1..1..2....2..0..1..2....1..4..1..2....0..2..1..0
..1..1..4..1....0..0..0..0....1..3..0..0....0..1..0..0....1..1..4..1
..0..2..1..0....0..3..0..0....0..0..0..0....1..2..0..0....2..1..1..2

Crossrefs

Sequence in context: A137611 A199106 A197203 * A239450 A187665 A088718

Adjacent sequences: A197798 A197799 A197800 * A197802 A197803 A197804

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved