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A199091
Number of n X 8 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to exactly one horizontal or vertical neighbor.
0
1, 709, 24353, 5471810, 349276385, 59171718202
OFFSET
1,2
COMMENTS
Column 8 of A199092.
EXAMPLE
Some solutions for 3 X 8
..0..0..1..1..2..3..3..2....0..0..1..1..2..2..3..3....0..0..1..1..0..0..1..1
..1..2..2..3..2..1..1..2....1..1..0..3..1..0..0..2....1..1..2..2..3..3..2..2
..1..0..0..3..0..0..3..3....2..2..0..3..1..3..3..2....0..0..3..3..2..2..3..3
CROSSREFS
Cf. A199092.
Sequence in context: A059312 A114923 A057849 * A058324 A251290 A232836
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2011
STATUS
approved