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A268006
Number of 3Xn 0..n arrays with every repeated value in every row and column equal to the previous repeated value, and new values introduced in row-major sequential order.
0
4, 122, 11051, 1880990, 555258347, 256785961187, 172734549522161, 159978813272172457, 195695804013150974073, 306159594755630395108860, 597115754061736885180703542
OFFSET
1,1
COMMENTS
Row 3 of A268003.
EXAMPLE
Some solutions for n=3
..0..0..1....0..0..1....0..0..1....0..1..2....0..1..0....0..1..1....0..1..2
..0..2..3....2..0..2....0..2..3....3..0..2....2..1..1....1..2..3....0..1..0
..2..0..1....3..2..2....3..0..3....2..1..3....0..0..3....1..1..0....0..0..0
CROSSREFS
Cf. A268003.
Sequence in context: A364948 A080179 A268050 * A144993 A064681 A219871
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2016
STATUS
approved