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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
1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 18 2011
STATUS
approved