A231644 Number of n X n 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors

3, 35, 920, 137961, 96014413, 374409597564, 7673178325424236, 823755531731133088630, 468550736330699430524865279

Offset

1,1

Comments

Diagonal of A231651

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A210897 A267221 A135516 * A368389 A287405 A107712

Adjacent sequences: A231641 A231642 A231643 * A231645 A231646 A231647

Keyword

nonn

Author

R. H. Hardin, Nov 12 2013

Status

approved