A222751 Number of 4Xn 0..3 arrays with exactly floor(4Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 685, 125094, 27397461, 5989744766, 1324592085403, 294955698998860, 66064733675822897, 14869951771796014493, 3360970838387265054462, 762388660819620686155665, 173472790844083347576048482

Offset

1,2

Comments

Row 4 of A222747

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for n=3
..0..1..1....0..1..1....0..1..0....0..1..1....0..1..0....0..1..1....0..1..2
..1..0..2....0..2..0....1..1..1....2..1..0....2..3..3....0..1..0....1..1..0
..1..1..0....3..1..2....2..0..0....0..2..0....2..1..1....1..2..1....2..1..1
..1..2..3....1..2..3....1..2..1....3..0..0....3..1..1....2..0..1....3..1..2

Crossrefs

Sequence in context: A107514 A116219 A232199 * A234817 A203459 A101944

Adjacent sequences: A222748 A222749 A222750 * A222752 A222753 A222754

Keyword

nonn

Author

R. H. Hardin Mar 04 2013

Status

approved