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A189349 Number of nX3 array permutations with each element moving one space diagonally, horizontally or vertically 1
0, 13, 48, 557, 3632, 30769, 229248, 1815601, 13960720, 108880333, 843387440, 6554347309, 50856496800, 394905287105, 3065356528128, 23798261444545, 184745059744352, 1434227515809901, 11134091807034928, 86436190372455949 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A189355

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 2*a(n-1) +41*a(n-2) +44*a(n-3) -118*a(n-4) +118*a(n-6) -44*a(n-7) -41*a(n-8) -2*a(n-9) +a(n-10)

EXAMPLE

Some solutions for 4X3

..3..0..1....3..4..1....3..2..5....3..0..1....3..2..5....1..4..5....4..2..1

..7..5..2....0..8..2....0..7..1....4..8..2....7..0..1....0..8..2....0..5..8

.10..4.11....9.11..5....9..6..4....9.11..5....9.10..4...10..3.11....9..3.11

..6..9..8...10..6..7...10.11..8...10..6..7....6.11..8....6..9..7....6..7.10

CROSSREFS

Sequence in context: A200254 A288746 A220707 * A013200 A156694 A080171

Adjacent sequences:  A189346 A189347 A189348 * A189350 A189351 A189352

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 20 2011

STATUS

approved

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Last modified November 23 21:46 EST 2017. Contains 295141 sequences.