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A196011
Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors within one of itself
0
1, 1, 2, 25, 106, 708, 22711, 670449, 44864449, 5122273171, 1106078073333, 426788297174150
OFFSET
1,3
COMMENTS
Diagonal of A196017
EXAMPLE
Some solutions for n=4
..2..3..2..2....2..3..2..0....0..2..3..2....0..2..2..2....2..2..3..2
..3..3..0..2....3..4..3..2....2..3..4..3....2..3..0..2....2..0..3..3
..3..4..3..2....2..3..0..2....2..0..3..2....3..4..3..2....2..3..4..3
..2..3..2..0....0..2..2..2....2..2..2..0....2..3..2..0....0..2..3..2
CROSSREFS
Sequence in context: A123012 A175522 A226418 * A080515 A258943 A009381
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 26 2011
STATUS
approved