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A196211
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4
0
1, 9, 58, 2161, 173216, 33962624, 17831030743, 24799094512239
OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 2's, every 4 is next to 4 4's
Diagonal of A196218
EXAMPLE
Some solutions for n=4
..1..1..0..0....1..2..0..1....1..0..1..1....0..0..1..1....0..1..2..1
..0..1..1..1....0..1..1..1....1..0..2..0....1..1..1..0....0..1..2..0
..1..1..1..1....0..2..1..0....2..1..1..0....2..1..1..0....0..1..1..2
..1..0..0..0....0..0..1..1....0..2..1..0....0..0..1..1....1..1..0..1
CROSSREFS
Sequence in context: A055423 A322207 A196293 * A196679 A276450 A276648
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 29 2011
STATUS
approved