A265966 Number of n X n 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.

5, 288, 6112, 74248, 631264, 5006296, 34825856, 249438952, 1579115104

Offset: 1

Author

R. H. Hardin, Dec 19 2015

Keywords

• nonn

Comments

Diagonal of A265973.

Examples

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

Crossrefs

Cf. A265973.