A223108 Number of 5Xn 0..2 arrays with exactly floor(5Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

0, 1440, 255216, 45578462, 5423134897, 1004385117484, 117100753812154, 22365330024188924, 2599966609036869704, 506588140729236598506, 58901602084610433505785, 11633559506920886240645721

Offset

1,2

Comments

Row 5 of A223104

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A238041 A187291 A187193 * A023102 A289633 A282330

Adjacent sequences: A223105 A223106 A223107 * A223109 A223110 A223111

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved