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A209374
T(n,k) = Number of n X k 1..3 arrays with no element with value z exactly a city block distance of z from another element with value z.
9
3, 8, 8, 19, 39, 19, 35, 84, 84, 35, 64, 129, 115, 129, 64, 110, 178, 242, 242, 178, 110, 185, 338, 690, 968, 690, 338, 185, 322, 722, 1922, 3698, 3698, 1922, 722, 322, 599, 1568, 5460, 14112, 19434, 14112, 5460, 1568, 599, 1084, 3362, 15488, 54450, 99458
OFFSET
1,1
COMMENTS
Table starts
...3....8....19.....35......64......110.......185........322.........599
...8...39....84....129.....178......338.......722.......1568........3362
..19...84...115....242.....690.....1922......5460......15488.......43792
..35..129...242....968....3698....14112.....54450.....208658......798848
..64..178...690...3698...19434....99458....510378....2622050....13507474
.110..338..1922..14112...99458...677448...4657352...32224392...222731618
.185..722..5460..54450..510378..4657352..43249360..402144800..3725851316
.322.1568.15488.208658.2622050.32224392.402144800.5008603698.62277674888
LINKS
EXAMPLE
Some solutions for n=5, k=3
..3..2..3....2..3..1....3..2..2....2..2..1....3..1..3....3..2..2....1..2..1
..1..2..1....2..1..3....1..3..1....3..1..3....1..3..2....1..3..1....3..1..3
..3..1..3....1..3..2....2..1..3....1..3..1....3..1..3....3..1..3....1..3..2
..1..3..1....3..1..3....1..3..1....3..2..2....2..2..1....1..3..1....2..1..3
..2..2..3....2..2..1....3..2..3....1..3..1....3..1..3....3..1..2....2..3..1
CROSSREFS
Sequence in context: A032538 A168209 A305513 * A101385 A161432 A229380
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 07 2012
STATUS
approved