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A268162
Number of 5 X n arrays containing n copies of 0..5-1 with every element equal to at least one vertical or antidiagonal neighbor and the top left element equal to 0.
0
0, 0, 456, 23592, 10213152, 871718016, 131259920304, 22870582657920, 3420936792374976
OFFSET
1,3
COMMENTS
Row 5 of A268159.
EXAMPLE
Some solutions for n=4
..0..4..2..2....0..4..0..3....0..0..2..1....0..0..3..1....0..0..2..4
..0..4..2..4....0..4..0..3....0..4..2..1....0..3..1..3....0..2..3..4
..1..1..2..4....4..4..3..1....0..4..1..1....0..2..2..3....0..3..3..1
..1..0..3..3....2..3..1..2....4..3..2..3....1..2..4..4....3..2..4..1
..1..0..3..3....2..1..1..2....4..3..2..3....1..2..4..4....2..4..1..1
CROSSREFS
Cf. A268159.
Sequence in context: A200784 A077578 A329756 * A223750 A048110 A282101
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Jan 27 2016
STATUS
approved