A195955 Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors unequal to itself

1, 1, 10, 19, 33, 214, 945, 4847, 52912, 661587, 10923672

Offset

1,3

Comments

Diagonal of A195962

Links

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

Example

Some solutions for n=5
..1..1..1..3..1....1..2..3..2..1....1..1..1..1..1....1..3..2..2..1
..2..2..1..1..1....1..2..4..2..1....3..2..2..2..3....1..4..3..3..1
..3..2..1..1..3....1..2..2..2..1....2..2..3..2..2....1..2..2..2..1
..2..2..1..1..1....1..4..3..3..1....3..4..3..4..3....1..2..4..2..1
..1..1..1..3..1....1..3..2..2..1....1..1..1..1..1....1..2..3..2..1

Crossrefs

Sequence in context: A109334 A370916 A085728 * A374806 A127194 A083705

Adjacent sequences: A195952 A195953 A195954 * A195956 A195957 A195958

Keyword

nonn

Author

R. H. Hardin Sep 25 2011

Status

approved