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A268181
Number of 3Xn 0..n arrays with every repeated value in every row equal to, and in every column unequal to, the previous repeated value, and new values introduced in row-major sequential order.
0
3, 96, 9054, 1589578, 479973420, 225814538887, 153953047945654, 144125445548106706, 177859506524316980568, 280296331296968179117250
OFFSET
1,1
COMMENTS
Row 3 of A268180.
EXAMPLE
Some solutions for n=3
..0..1..0....0..0..1....0..1..2....0..1..2....0..1..2....0..1..0....0..0..0
..2..0..0....2..2..3....3..2..0....1..1..0....3..2..1....2..0..0....1..1..2
..0..1..3....2..2..2....1..0..1....2..2..2....3..3..0....2..2..2....2..1..2
CROSSREFS
Cf. A268180.
Sequence in context: A300609 A301351 A268012 * A030262 A107173 A100494
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2016
STATUS
approved