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A198149 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,0,1,1 for x=0,1,2,3,4 0
1, 7, 54, 2093, 260917, 108428600, 147146211014, 642756367398421 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 1's
Diagonal of A198155
LINKS
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..2..0..0..1....1..0..0..2....1..3..1..0....0..1..3..1....1..3..1..0
..0..2..1..3....3..1..0..0....0..1..4..1....1..4..1..0....0..1..4..1
..0..1..4..1....1..4..1..0....0..0..1..3....3..1..0..0....0..2..1..3
..1..3..1..0....0..1..3..1....2..0..0..1....1..0..0..2....2..0..0..1
CROSSREFS
Sequence in context: A289865 A182124 A303889 * A203878 A043077 A192718
KEYWORD
nonn
AUTHOR
_R. H. Hardin_ Oct 21 2011
STATUS
approved

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Last modified May 22 03:46 EDT 2024. Contains 372741 sequences. (Running on oeis4.)