A197803 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,1 for x=0,1,2,3,4

6, 496, 22742, 1003304, 45619023, 2076384112, 94343594548, 4281509896358, 194608470264250, 8843165356246981, 401738582610521643, 18252432225115868140, 829303172132470927219, 37678616097510599424872

Offset

1,1

Comments

Every 0 is next to 0 4'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 1's

Column 6 of A197805

Links

R. H. Hardin, Table of n, a(n) for n = 1..178

Example

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

Crossrefs

Sequence in context: A203428 A264741 A197205 * A099057 A123278 A127605

Adjacent sequences: A197800 A197801 A197802 * A197804 A197805 A197806

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved