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A241075
Number of nX4 0..2 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..2 introduced in row major order
1
4, 39, 386, 4191, 47974, 572023, 6996566, 86779948, 1085281623, 13635536887, 171768785341, 2167009960686, 27361588744430, 345643091260812, 4367483662096514, 55195179067472373, 697603829676805964
OFFSET
1,1
COMMENTS
Column 4 of A241078
FORMULA
Empirical recurrence of order 96 (see link above)
EXAMPLE
Some solutions for n=4
..0..1..0..1....0..1..0..2....0..1..0..1....0..1..0..0....0..0..0..0
..2..0..2..0....2..2..2..1....1..2..1..2....1..2..0..0....0..0..0..0
..1..2..1..2....2..2..2..0....2..1..0..0....0..0..2..1....1..0..1..0
..0..1..2..0....2..2..2..1....0..2..0..0....0..0..1..0....2..0..0..0
CROSSREFS
Sequence in context: A198853 A093851 A224755 * A123618 A199757 A046449
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 15 2014
STATUS
approved