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A232934
Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, vertically or antidiagonally.
1
3, 12, 84, 1048, 26644, 1294504, 123516664, 22870954236, 8259047739212, 5804528923256596, 7946219601520287416, 21181791025549725373140, 109959477313325884615593152, 1111595819289260873354274996460
OFFSET
1,1
COMMENTS
Diagonal of A232941.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..1....1..2..2..2..2....2..2..2..2..1....0..1..0..0..0
..0..1..0..0..0....2..2..2..2..2....1..2..2..2..2....0..0..0..0..0
..0..0..1..0..0....2..1..2..2..2....2..2..2..2..2....1..0..1..0..0
..0..0..0..0..1....2..2..1..2..2....1..2..2..2..2....0..0..0..0..0
..1..0..0..0..0....2..2..2..1..2....2..1..2..1..2....1..0..1..0..0
CROSSREFS
Cf. A232941.
Sequence in context: A225905 A355322 A070825 * A077047 A074505 A260912
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2013
STATUS
approved