A196634 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4

1, 65, 780, 10708, 152925, 2140040, 29718190, 415475619, 5791281872, 80883758124, 1128675587447, 15753191583307, 219869040473415, 3068688709980912, 42829911529529182, 597780110150837643, 8343266217471860095

Offset

1,2

Comments

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

Column 6 of A196636

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Sequence in context: A343508 A116277 A220389 * A196639 A008516 A000540

Adjacent sequences: A196631 A196632 A196633 * A196635 A196636 A196637

Keyword

nonn

Author

R. H. Hardin Oct 04 2011

Status

approved