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A196323 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,3,0,4,2 for x=0,1,2,3,4 0
1, 7, 27, 295, 5538, 187787, 11937347, 1373281599, 286527796314, 108679921617242, 74775639068058776 (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 3's, every 2 is next to 2 0's, every 3 is next to 3 4's, every 4 is next to 4 2's
Diagonal of A196329
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..2..2..0....2..0..2..0....0..0..2..0....0..0..0..2
..0..0..2..2....2..0..0..0....0..0..2..0....0..0..2..2....0..0..0..0
..0..0..2..0....2..0..2..2....0..2..2..0....0..0..0..0....0..0..0..0
..0..0..2..0....0..0..2..0....0..2..0..0....0..0..0..0....0..2..2..0
CROSSREFS
Sequence in context: A193257 A330621 A173193 * A003148 A033910 A196647
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 01 2011
STATUS
approved

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Last modified July 22 07:42 EDT 2024. Contains 374481 sequences. (Running on oeis4.)