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URL: https://oeis.org/A196725

⇱ A196725 - OEIS

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A196725
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,1,4,0,3 for x=0,1,2,3,4.
0
1, 5, 76, 3394, 547874, 280203939, 466328648058, 2525576718158704, 44298467976731953802, 2511317101071327391390891
OFFSET
1,2
COMMENTS
Every 0 is next to 0 2's, every 1 is next to 1 1's, every 2 is next to 2 4's, every 3 is next to 3 0's, every 4 is next to 4 3's
Diagonal of A196729
EXAMPLE
Some solutions for n=4
..0..0..0..0....1..0..0..0....0..1..1..0....0..0..0..1....0..3..0..1
..1..3..0..1....1..0..0..0....1..0..0..0....0..0..0..1....0..0..3..1
..1..0..0..1....0..1..1..0....1..0..3..1....3..0..0..0....0..0..0..0
..0..0..3..0....0..0..0..0....0..0..0..1....0..0..1..1....0..0..3..0
CROSSREFS
Sequence in context: A136300 A382792 A196689 * A197063 A144997 A088756
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 05 2011
STATUS
approved