A266080 Number of nX7 integer arrays with each element equal to the number of horizontal and vertical neighbors differing from itself by exactly one.

1, 1, 10, 23, 55, 146, 466, 1155, 3364, 9229, 25566, 70308, 196647, 544696, 1527557, 4229863, 11872589, 32954820, 92269343, 256481433, 718070373, 1997666638, 5589444252, 15558565416, 43515994717, 121194482007, 338915914513

Offset

1,3

Comments

Column 7 of A266081.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..2..3..2
..2..3..2..2..3..2..0....0..0..2..3..2..0..0....0..0..0..0..3..4..3
..3..4..3..3..4..3..0....0..0..3..4..3..0..0....0..0..0..0..2..3..2
..2..3..2..2..3..2..0....0..0..2..3..2..0..0....0..0..0..0..0..0..0

Crossrefs

Cf. A266081.

Sequence in context: A072245 A135277 A156202 * A316093 A262485 A219940

Adjacent sequences: A266077 A266078 A266079 * A266081 A266082 A266083

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved