A265931 Number of 3Xn 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.

125, 4616, 17936, 72772, 273616, 1042020, 3883480, 14617920, 55503312, 210277584, 791400360, 2978940280, 11257286824, 42533780480, 160460490488, 604824610736, 2282902792488, 8619222724444, 32528290390168, 122688090414988

Offset

1,1

Comments

Row 3 of A265928.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A265928.

Sequence in context: A030690 A017451 A241034 * A265477 A017583 A046232

Adjacent sequences: A265928 A265929 A265930 * A265932 A265933 A265934

Keyword

nonn

Author

R. H. Hardin, Dec 18 2015

Status

approved