A196981 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,1,0,4 for x=0,1,2,3,4

9, 803, 31386, 1272373, 53216978, 2188092870, 90401915964, 3740738215983, 154705956361411, 6393070820268590, 264219149718966451, 10923404535101323602, 451574917966470461834, 18666476210321258568728

Offset

1,1

Comments

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

Column 7 of A196982

Links

R. H. Hardin, Table of n, a(n) for n = 1..186

Example

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

Crossrefs

Sequence in context: A137065 A272853 A332179 * A197166 A015025 A225169

Adjacent sequences: A196978 A196979 A196980 * A196982 A196983 A196984

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved