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A199586
Number of nX4 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 at least one horizontal or vertical neighbor
0
0, 5, 23, 2943, 69023, 4748991, 207722398, 12106398432, 637249804809, 36336881030430
OFFSET
1,2
COMMENTS
Column 4 of A199588
EXAMPLE
Some solutions for n=3
..0..0..1..2....0..1..2..2....0..1..1..1....0..0..1..1....0..0..0..1
..0..1..1..2....0..1..1..2....0..2..3..3....0..2..3..1....2..2..3..1
..3..3..3..2....0..3..3..3....0..2..2..3....2..2..3..3....2..3..3..1
CROSSREFS
Sequence in context: A002811 A177134 A199361 * A120488 A309210 A345880
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 08 2011
STATUS
approved