A223110 Number of 7Xn 0..2 arrays with exactly floor(7Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

0, 111104, 137988216, 183046326118, 158311829556848, 213925430588811826, 178267875091681095647, 246859798712745076757039, 203854469855977979939565927

Offset

1,2

Comments

Row 7 of A223104

Links

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

Example

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

Crossrefs

Sequence in context: A103874 A195223 A205243 * A094325 A171725 A135403

Adjacent sequences: A223107 A223108 A223109 * A223111 A223112 A223113

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved