A222696 Number of 7Xn 0..2 arrays with exactly floor(7Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

0, 5440, 159672, 11082863, 301760538, 27752564898, 832227066041, 83923543594779, 2708485928608316, 290028583892214392, 9899860627729886022

Offset

1,2

Comments

Row 7 of A222690

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A363782 A116894 A124629 * A125016 A234157 A204474

Adjacent sequences: A222693 A222694 A222695 * A222697 A222698 A222699

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved