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URL: https://oeis.org/A196139

⇱ A196139 - OEIS

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A196139
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.
0
1, 5, 7, 83, 481, 2599, 24615, 330889, 4431097, 82611569, 1973678929, 55783136985
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 4's, every 3 is next to 3 1's, every 4 is next to 4 2's
Diagonal of A196146
EXAMPLE
Some solutions for n=4
.1.3.1.0...0.1.3.1...1.3.1.0...0.0.1.1...0.1.1.0
.0.1.1.0...0.1.1.0...0.1.1.0...1.1.1.0...1.1.1.1
.1.1.1.1...0.1.1.0...0.1.1.1...3.1.1.0...1.0.0.1
.1.0.0.1...1.3.1.0...1.1.0.1...1.0.1.1...1.0.0.1
CROSSREFS
Sequence in context: A340468 A351636 A062583 * A165784 A329006 A176619
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 28 2011
STATUS
approved