A196808 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,3,0,1 for x=0,1,2,3,4

1, 99, 1468, 52291, 1730105, 46685074, 1436535356, 42144649101, 1242942835600, 36966191677933, 1095659240954513, 32430161990804370, 960817109357914432, 28466699840871876758, 843388951593615572344, 24985495292021432741463

Offset

1,2

Comments

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

Column 7 of A196809

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..3..0..3..0..0..0....0..0..3..0..0..0..0
..0..2..3..0..3..0..3....3..0..0..0..0..0..0....0..0..0..0..3..3..0
..0..3..0..3..2..0..0....0..3..2..3..0..0..3....3..0..3..3..0..0..3
..0..0..3..0..0..3..0....0..0..1..0..0..3..0....0..3..0..0..0..3..0

Crossrefs

Sequence in context: A196577 A259693 A196785 * A305721 A197372 A174944

Adjacent sequences: A196805 A196806 A196807 * A196809 A196810 A196811

Keyword

nonn

Author

R. H. Hardin Oct 06 2011

Status

approved