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A196780 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,3,0,1 for x=0,1,2,3,4 0
1, 1, 17, 145, 6137, 404589, 65282256, 22331701461, 16774271567427, 27461523421500033, 98038364298327333400 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Every 0 is next to 0 2's, every 1 is next to 1 4's, every 2 is next to 2 3's, every 3 is next to 3 0's, every 4 is next to 4 1's
Diagonal of A196786
LINKS
EXAMPLE
Some solutions for n=4
..0..3..0..0....0..3..0..0....0..0..0..0....0..0..3..0....0..0..3..0
..3..0..1..0....0..0..0..0....0..3..3..0....3..0..0..0....3..0..0..0
..0..1..4..1....3..0..0..3....3..0..0..0....0..0..0..0....0..3..3..0
..0..0..1..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
CROSSREFS
Sequence in context: A233328 A364155 A083294 * A208506 A299599 A244852
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 06 2011
STATUS
approved

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Last modified March 4 23:31 EST 2024. Contains 370537 sequences. (Running on oeis4.)