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A265678
Number of nX3 arrays containing 3 copies of 0..n-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
0
1, 1, 17, 632, 54920, 7286105, 1365147580, 342267410418, 110526428031479, 44658757291775157
OFFSET
1,3
COMMENTS
Column 3 of A265679.
EXAMPLE
Some solutions for n=4
..0..1..0....0..1..2....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2
..2..3..1....3..0..3....2..3..2....3..3..1....3..3..1....3..0..3....2..0..1
..0..2..2....1..1..2....1..1..0....1..0..0....0..2..2....2..1..1....3..2..0
..1..3..3....2..3..0....3..3..2....3..2..2....1..0..3....3..2..0....1..3..3
CROSSREFS
Cf. A265679.
Sequence in context: A012219 A349783 A219075 * A200907 A203170 A350981
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 13 2015
STATUS
approved