A265445 Number of nX6 0..n+6-2 arrays with upper left zero and lower right n+6-2 and each element differing from its horizontal and vertical neighbors by one or two.

29, 2218, 174794, 19827238, 4188662714, 569620472894, 48022286879776, 3649109954684315, 499643230059285544, 82686619913586153336, 10137571266101024247384, 952794984284599518382440

Offset

1,1

Comments

Column 6 of A265447.

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

Some solutions for n=3
..0..2..4..5..6..7....0..2..3..2..4..6....0..2..3..2..4..6....0..1..2..4..2..4
..2..3..2..3..5..6....2..4..5..4..3..5....2..4..2..4..3..5....2..3..4..5..4..5
..3..4..3..4..6..7....1..2..4..6..5..7....3..5..4..6..5..7....3..5..6..4..6..7

Crossrefs

Cf. A265447.

Sequence in context: A045688 A084223 A138755 * A370339 A316333 A377218

Adjacent sequences: A265442 A265443 A265444 * A265446 A265447 A265448

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved