A196972 Number of n X 6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,2,1 for x=0,1,2,3,4.

8, 122, 1380, 20500, 260394, 3602632, 47228658, 627332704, 8353150047, 111159106170, 1478940309946, 19675820763094, 261790325506593, 3482887310542208, 46337842544897348, 616501427043267034

Offset

1,1

Comments

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

Column 6 of A196974.

Links

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

Example

Some solutions for n=4
..2..0..0..2..0..0....0..0..0..0..2..0....0..2..0..2..0..0....0..2..0..0..2..0
..0..0..2..2..0..2....0..2..2..0..1..0....2..3..1..2..0..2....0..2..0..0..2..0
..0..0..2..0..0..2....0..2..3..2..3..2....0..2..2..0..0..2....0..2..0..0..2..0
..0..0..2..0..0..0....0..0..1..0..2..0....0..0..0..0..0..0....0..2..0..0..2..0

Crossrefs

Cf. A196974.

Sequence in context: A196341 A196320 A197305 * A197559 A222498 A361308

Adjacent sequences: A196969 A196970 A196971 * A196973 A196974 A196975

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved