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A189651
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Number of 3Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally
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1
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1, 32, 263, 4277, 55440, 799069, 11047585, 155610272, 2174615543, 30495310793, 427003730560, 5982947971505, 83805935210153, 1174054970088496, 16446690057231391, 230398085842470229, 3227563109360717136
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OFFSET
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1,2
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COMMENTS
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Row 3 of A189650
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..200
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FORMULA
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Empirical: a(n) = 10*a(n-1) +75*a(n-2) -240*a(n-3) -399*a(n-4) +972*a(n-5) -1263*a(n-6) +482*a(n-7) +669*a(n-8) -100*a(n-9) -9*a(n-10)
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EXAMPLE
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Some solutions for 3X3
..1..5..2....1..0..2....4..0..2....0..2..1....0..2..4....0..1..2....1..0..4
..3..0..4....3..6..5....7..3..1....4..6..5....1..3..5....3..4..5....7..2..5
..7..6..8....4..7..8....6..5..8....7..3..8....7..6..8....7..6..8....6..3..8
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CROSSREFS
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Sequence in context: A022327 A318022 A320407 * A145711 A125369 A126527
Adjacent sequences: A189648 A189649 A189650 * A189652 A189653 A189654
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Apr 24 2011
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STATUS
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approved
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