A265469 Number of 4Xn 0..4+n-2 arrays with upper left zero and lower right 4+n-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.

16, 232, 9808, 398508, 17481072, 593770274, 18032679492, 582513489941, 20195132214242, 664241150437850, 19904753690273680, 578485017566375562, 17470345171228192441, 541176178303872764969, 16319402667685554635137

Offset

1,1

Comments

Row 4 of A265466.

Links

R. H. Hardin, Table of n, a(n) for n = 1..162

Example

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

Crossrefs

Cf. A265466.

Sequence in context: A292341 A222389 A222938 * A111096 A283853 A266099

Adjacent sequences: A265466 A265467 A265468 * A265470 A265471 A265472

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved