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A196331
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,3,1,2 for x=0,1,2,3,4
0
1, 5, 7, 335, 3793, 237905, 20775275, 5845172493, 2321484416437
OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 1's, every 4 is next to 4 2's
Diagonal of A196337
EXAMPLE
Some solutions for n=4
..0..1..1..0....1..1..0..1....1..0..0..1....0..0..0..0....0..1..1..0
..0..3..1..0....0..3..1..3....1..0..0..1....1..1..3..1....0..1..3..0
..0..1..1..0....0..1..1..1....1..1..1..1....1..1..1..3....0..1..1..0
..1..3..1..0....1..1..0..0....0..1..1..0....0..0..0..1....1..3..1..0
CROSSREFS
Sequence in context: A187022 A196309 A196281 * A344361 A159019 A059394
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 01 2011
STATUS
approved