A197676 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,0,1 for x=0,1,2,3,4

9, 73, 721, 5639, 45162, 358209, 2871646, 22955155, 183536379, 1469158622, 11763937411, 94210675699, 754505710941, 6042768236882, 48396947691377, 387618351751497, 3104512821455985, 24864750644129585, 199147883255433840

Offset

1,1

Comments

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

Column 5 of A197679

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..0..1..1..0....0..0..0..1..2....0..1..1..0..0....0..0..0..1..2
..3..0..1..1..0....0..3..1..4..1....0..1..1..0..0....0..3..1..4..1
..0..3..1..4..1....3..0..1..1..0....1..4..1..3..0....0..0..1..1..0
..0..0..0..1..2....0..0..1..1..0....2..1..0..0..0....0..0..1..1..0

Crossrefs

Sequence in context: A086226 A338677 A199677 * A367977 A197534 A015465

Adjacent sequences: A197673 A197674 A197675 * A197677 A197678 A197679

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved