A241075 Number of n X 4 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, 8817351733053667416, 111449935361431165662, 1408732525310901695390

Offset

1,1

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

Column 4 of A241078.

Sequence in context: A198853 A093851 A224755 * A396580 A123618 A199757

Adjacent sequences: A241072 A241073 A241074 * A241076 A241077 A241078

Keyword

nonn

Author

R. H. Hardin, Apr 15 2014

Status

approved