A197447 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4

7, 107, 2678, 52117, 1108699, 23829080, 504568165, 10724642167, 228248265080, 4853181015432, 103200753393047, 2194748772730124, 46673287485335449, 992547357156970890, 21107504726738892508, 448871249985110511395

Offset

1,1

Comments

Every 0 is next to 0 2's, every 1 is next to 1 1'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 5 of A197450

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

Crossrefs

Sequence in context: A156204 A231519 A367157 * A202780 A297804 A218819

Adjacent sequences: A197444 A197445 A197446 * A197448 A197449 A197450

Keyword

nonn

Author

R. H. Hardin Oct 15 2011

Status

approved