A196983 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4

1, 1, 10, 113, 4244, 389518, 93411402, 60168452277, 101406070116889, 451089091560500274, 5277294850017253970644

Offset

1,3

Comments

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

Diagonal of A196989

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A129866 A024130 A176824 * A199908 A185391 A104520

Adjacent sequences: A196980 A196981 A196982 * A196984 A196985 A196986

Keyword

nonn

Author

R. H. Hardin Oct 08 2011

Status

approved