A265921 Number of n X n 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.

5, 340, 17936, 542940, 8821464, 112139348, 1135042936, 15078628680, 249568483336, 2294594493868, 25866958553904

Offset

1,1

Comments

Diagonal of A265928.

Links

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

Example

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

Crossrefs

Cf. A265928.

Sequence in context: A029495 A086900 A200002 * A203684 A124477 A059839

Adjacent sequences: A265918 A265919 A265920 * A265922 A265923 A265924

Keyword

nonn

Author

R. H. Hardin, Dec 18 2015

Status

approved