A196717 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,2,1,3 for x=0,1,2,3,4

17, 468, 7368, 222112, 5443550, 139260414, 3464871506, 87347779774, 2189117562853, 54554907624355, 1364716687922414, 34203898910729035, 856342981705944451, 21436725243287303475, 536742033291537818929

Offset

1,1

Comments

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

Column 7 of A196718

Links

R. H. Hardin, Table of n, a(n) for n = 1..44

Example

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

Crossrefs

Sequence in context: A009051 A035276 A196484 * A220598 A239926 A111920

Adjacent sequences: A196714 A196715 A196716 * A196718 A196719 A196720

Keyword

nonn

Author

R. H. Hardin Oct 05 2011

Status

approved