A197178 Number of n X 6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,2,1,0,0 for x=0,1,2,3,4.

6, 144, 2695, 50864, 1096217, 22335117, 467923636, 9715240362, 202416969329, 4212994659413, 87725436272795, 1826377617714231, 38026405009459764, 791717063144087158, 16483851476415953516, 343198919447137443062

Offset

1,1

Comments

Every 0 is next to 0 2's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's.

Column 6 of A197180.

Links

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

Example

Some solutions containing all values 0 to 4 for n=4
..0..1..2..2..1..0....0..0..3..0..0..0....2..1..0..0..3..0....0..3..0..1..2..1
..0..0..1..1..0..3....0..0..0..0..4..0....1..0..0..4..0..0....0..0..0..0..3..0
..0..0..3..0..4..0....0..3..0..4..0..0....0..4..0..0..0..0....0..4..0..3..0..3
..0..0..0..3..0..0....1..2..1..0..0..0....0..0..3..0..0..0....0..0..1..2..1..0

Crossrefs

Cf. A197180.

Sequence in context: A196811 A200457 A128785 * A208230 A010043 A270504

Adjacent sequences: A197175 A197176 A197177 * A197179 A197180 A197181

Keyword

nonn

Author

R. H. Hardin, Oct 11 2011

Status

approved