A185822 1/5 the number of nX6 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors

29, 49248, 35446376, 32995092992, 28043363244452

Offset

1,1

Comments

Column 6 of A185825

Links

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

Example

Some solutions for 4X6 with a(1,1)=0
..0..0..1..1..4..4....0..0..2..2..0..0....0..0..4..4..2..2....0..0..0..3..2..3
..0..1..0..2..2..4....0..1..0..0..0..1....0..1..0..4..1..2....0..1..0..3..2..3
..0..1..0..2..0..2....0..1..0..2..1..1....0..1..0..2..1..2....0..1..0..2..4..4
..0..0..0..2..0..2....0..0..0..2..4..4....0..0..0..2..3..3....0..0..0..2..4..4

Crossrefs

Sequence in context: A296176 A159437 A343451 * A321666 A139775 A303734

Adjacent sequences: A185819 A185820 A185821 * A185823 A185824 A185825

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved