A197195 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4

1, 5, 25, 314, 7363, 350711, 33176391, 6258308430, 2359068239358, 1774609159901861

Offset

1,2

Comments

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

Diagonal of A197199

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A165656 A370336 A145773 * A358545 A285602 A072324

Adjacent sequences: A197192 A197193 A197194 * A197196 A197197 A197198

Keyword

nonn

Author

R. H. Hardin Oct 11 2011

Status

approved