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

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

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 96

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

Adjacent sequences: A241072 A241073 A241074 * A241076 A241077 A241078

Keyword

nonn

Author

R. H. Hardin, Apr 15 2014

Status

approved