A198641 Number of 2nX8 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors

3936, 10937316, 30189380016, 83436203795656, 230598746057340176

Offset

1,1

Comments

Column 4 of A198642

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A031822 A288894 A289563 * A045232 A252455 A233688

Adjacent sequences: A198638 A198639 A198640 * A198642 A198643 A198644

Keyword

nonn

Author

R. H. Hardin Oct 27 2011

Status

approved