A265446 Number of nX7 0..n+7-2 arrays with upper left zero and lower right n+7-2 and each element differing from its horizontal and vertical neighbors by one or two.

79, 9702, 2345091, 901139380, 268477963202, 48022286879776, 7361174970568815, 2071801325342229101, 724116679121249252209, 183209634201490947436174, 34289307231187455472534949, 6896491826761223944473943348

Offset

1,1

Comments

Column 7 of A265447.

Links

R. H. Hardin, Table of n, a(n) for n = 1..35

Example

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

Crossrefs

Cf. A265447.

Sequence in context: A032910 A116235 A123814 * A145317 A363515 A251365

Adjacent sequences: A265443 A265444 A265445 * A265447 A265448 A265449

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved