A223118 Number of 5Xn 0..2 arrays with exactly floor(5Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

0, 1222, 92011, 10831996, 713593552, 92719306520, 6216619654268, 835754508657402, 56886498701051251

Offset

1,2

Comments

Row 5 of A223114

Links

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

Example

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

Crossrefs

Sequence in context: A053655 A068262 A328991 * A128655 A251446 A014488

Adjacent sequences: A223115 A223116 A223117 * A223119 A223120 A223121

Keyword

nonn

Author

R. H. Hardin, Mar 14 2013

Status

approved