A222997 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

2, 45, 534, 13655, 184475, 4816824, 67178532, 1775642951, 25210032184, 671307448829, 9642197765265, 258026527507712, 3736712737181234, 100342585948460924, 1462116657698476202, 39363517125888222983

Offset

1,1

Comments

Column 3 of A223000

Links

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

Example

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

Crossrefs

Sequence in context: A151583 A325935 A360065 * A092654 A209606 A100101

Adjacent sequences: A222994 A222995 A222996 * A222998 A222999 A223000

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved