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A199353
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 zero or one horizontal or vertical neighbors
0
1, 105, 7945, 705263, 66367192, 6518500460, 661357976129, 68780790321431, 7293552029780267, 785674669296654053
OFFSET
1,2
COMMENTS
Column 4 of A199356
EXAMPLE
Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..0..0....0..1..0..2....0..1..0..1
..2..3..0..2....2..1..0..3....2..1..3..3....1..2..3..0....2..3..2..0
..3..1..3..2....1..3..2..3....3..3..2..1....1..3..0..1....1..0..3..2
..2..3..1..0....2..0..3..2....1..2..0..2....3..2..3..2....3..2..3..1
CROSSREFS
Sequence in context: A075914 A075924 A359991 * A263888 A269474 A255497
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved