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A233219
Number of 3Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order
1
11, 452, 35446, 3054973, 268289572, 23644611625, 2085188355031, 183912477980908, 16221346021645357, 1430752109958104260, 126195026132569335016, 11130640168352123713243, 981743557172626207811542
OFFSET
1,1
COMMENTS
Row 3 of A233217
LINKS
FORMULA
Empirical: a(n) = 111*a(n-1) -2128*a(n-2) +10532*a(n-3) -17559*a(n-4) +9045*a(n-5) for n>7
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..0....0..1..5....0..1..1....0..1..2....0..1..2....0..1..2
..0..2..1....5..1..0....2..4..2....1..0..2....3..5..1....5..5..5....1..1..0
..4..0..4....2..2..0....0..0..0....2..1..1....1..1..0....3..3..5....1..1..3
CROSSREFS
Sequence in context: A360066 A354439 A180087 * A288685 A068235 A247598
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2013
STATUS
approved