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A196944
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,0,2,3 for x=0,1,2,3,4
0
1, 11, 210, 18060, 5039158, 4998342821, 17331168379114, 210721221635883326
OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 1's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 3's
Diagonal of A196950
EXAMPLE
Some solutions for n=4
..0..0..0..2....0..0..0..0....0..1..1..0....0..0..1..1....2..0..1..1
..0..1..1..0....0..0..1..1....0..0..2..1....1..1..2..0....0..0..0..2
..0..0..2..0....1..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0
..2..0..2..0....1..0..1..1....1..1..2..0....2..0..0..1....0..0..1..1
CROSSREFS
Sequence in context: A060496 A280072 A157691 * A112386 A160693 A167442
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 08 2011
STATUS
approved