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A265447
T(n,k)=Number of nXk 0..n+k-2 arrays with upper left zero and lower right n+k-2 and each element differing from its horizontal and vertical neighbors by one or two.
9
1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 9, 53, 145, 53, 9, 29, 455, 2825, 2825, 455, 29, 79, 2218, 25069, 57721, 25069, 2218, 79, 220, 9702, 174794, 744805, 744805, 174794, 9702, 220, 673, 59956, 2345091, 19827238, 41855199, 19827238, 2345091, 59956, 673, 2106, 444998
OFFSET
1,7
COMMENTS
Table starts
....1.......1..........1..............2.................9...................29
....1.......1..........2.............53...............455.................2218
....1.......2........145...........2825.............25069...............174794
....2......53.......2825..........57721............744805.............19827238
....9.....455......25069.........744805..........41855199...........4188662714
...29....2218.....174794.......19827238........4188662714.........569620472894
...79....9702....2345091......901139380......268477963202.......48022286879776
..220...59956...44474575....27582975041....11139856018641.....3649109954684315
..673..444998..628376593...585047767454...436718915555930...499643230059285544
.2106.2915881.6864539181.12075039660966.28503014136448930.82686619913586153336
LINKS
EXAMPLE
Some solutions for n=4 k=4
..0..1..2..4....0..1..2..4....0..1..2..4....0..1..3..4....0..2..3..4
..1..3..4..6....2..3..4..6....2..3..4..6....2..3..1..3....1..3..5..6
..3..5..3..5....3..4..6..4....4..5..3..5....4..5..3..4....3..4..3..5
..1..3..4..6....4..3..4..6....3..4..5..6....5..3..4..6....4..3..4..6
CROSSREFS
Sequence in context: A360310 A085056 A371619 * A156538 A249768 A217503
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 09 2015
STATUS
approved