A196973 Number of nX7 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

13, 275, 4800, 115563, 2246059, 47228658, 986337603, 20278906437, 420951074243, 8734501701701, 181050206799010, 3753750765133292, 77826189975568359, 1613547115315836603, 33453410187089875487, 693584699456224460683

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 7 of A196974

Links

R. H. Hardin, Table of n, a(n) for n = 1..160

Example

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

Crossrefs

Sequence in context: A196342 A196321 A197306 * A197560 A295096 A295550

Adjacent sequences: A196970 A196971 A196972 * A196974 A196975 A196976

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved