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A197084 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4 0
1, 2, 25, 631, 71867, 21996614, 21989908007, 68650847877254, 670636652224421841 (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 2's, every 3 is next to 3 0's, every 4 is next to 4 1's
Diagonal of A197090
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0....2..2..0..0....0..2..2..0....0..2..2..2....0..3..0..0
..0..2..2..2....2..2..0..0....0..2..2..0....0..2..0..2....0..0..1..0
..0..2..0..2....0..3..0..3....0..0..0..3....0..2..2..2....0..0..3..0
..0..2..2..2....0..0..0..0....0..0..3..0....0..0..0..0....0..0..0..0
CROSSREFS
Sequence in context: A322727 A090733 A330767 * A366038 A337153 A119829
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved

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Last modified April 13 22:20 EDT 2024. Contains 371646 sequences. (Running on oeis4.)