A209040 Number of n X n 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it

4, 124, 47700, 225262148, 13034933066892, 9239962457023110368, 80235179157233210417254036, 8534774056580607728132307076396612, 11121202754126311568095965858257048619933492

Offset

1,1

Comments

Diagonal of A209047

Links

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

Example

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

Crossrefs

Sequence in context: A090082 A243010 A343427 * A068891 A337245 A073351

Adjacent sequences: A209037 A209038 A209039 * A209041 A209042 A209043

Keyword

nonn

Author

R. H. Hardin Mar 04 2012

Status

approved