A222484 Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

3, 5, 33, 270, 3219, 34851, 374375, 3973169, 42982280, 460903822, 4976455334, 53808006211, 581903007779, 6320908811064, 68518381809825, 746547109498241, 8112995455405661, 88582659132995459, 964996864754354180

Offset

1,1

Comments

Column 4 of A222488

Links

R. H. Hardin, Table of n, a(n) for n = 1..126

Example

Some solutions for n=4
..0..0..0..0....0..0..0..0....0..1..2..0....0..0..1..2....0..1..2..0
..0..0..0..0....0..0..0..0....1..2..2..2....1..0..0..0....1..1..1..0
..0..0..0..0....0..1..0..0....2..2..2..2....0..0..0..0....1..1..1..1
..0..1..2..1....0..2..0..0....2..2..2..2....0..0..0..0....1..1..1..1

Crossrefs

Sequence in context: A225866 A332704 A263295 * A354849 A222630 A187993

Adjacent sequences: A222481 A222482 A222483 * A222485 A222486 A222487

Keyword

nonn

Author

R. H. Hardin Feb 22 2013

Status

approved