A265475 Number of nX3 0..n+3-2 arrays with upper left zero and lower right n+3-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.

3, 36, 1376, 32400, 498520, 26904969, 316565600, 26305920481, 304772051268, 27374995980544, 192909846708080, 29538240252689476, 160040330438580826, 32757366213429455376, 117782464124635833042, 37046871094548366652225

Offset

1,1

Comments

Column 3 of A265480.

Links

R. H. Hardin, Table of n, a(n) for n = 1..99

Example

Some solutions for n=4
..0..0..4....0..4..1....0..1..1....0..5..1....0..4..0....0..3..0....0..3..3
..2..2..2....5..2..5....2..2..2....3..2..3....5..2..2....5..2..5....1..1..4
..4..3..1....1..3..0....4..3..4....0..4..0....3..4..1....0..3..4....2..3..2
..1..2..5....2..2..5....2..2..5....2..1..5....5..2..5....4..2..5....4..0..5

Crossrefs

Cf. A265480.

Sequence in context: A303866 A126447 A102921 * A233197 A300770 A272660

Adjacent sequences: A265472 A265473 A265474 * A265476 A265477 A265478

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved