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A196338 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,4,0,2,3 for x=0,1,2,3,4 0
1, 7, 30, 495, 16949, 1300388, 224664284, 86035336419, 73179371169968, 138149268301786989 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Every 0 is next to 0 1's, every 1 is next to 1 4's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 3's
Diagonal of A196343
LINKS
EXAMPLE
Some solutions for n=4
..0..0..2..0....2..0..0..0....0..0..0..0....0..0..0..0....0..0..0..2
..2..3..2..0....0..0..2..2....0..0..0..0....0..2..3..2....0..0..0..0
..0..2..0..0....0..0..2..0....0..0..0..0....0..3..2..0....2..2..3..2
..0..2..0..0....2..0..2..0....0..2..2..0....0..2..0..0....0..0..2..0
CROSSREFS
Sequence in context: A026653 A271554 A296013 * A196315 A156347 A221402
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 01 2011
STATUS
approved

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Last modified July 24 12:40 EDT 2024. Contains 374583 sequences. (Running on oeis4.)