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A199199
Number of nX6 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 two horizontal or vertical neighbors
0
21, 571, 342958, 10692835, 9746409872, 329877369234
OFFSET
1,1
COMMENTS
Column 6 of A199201
EXAMPLE
Some solutions for n=4
..0..0..1..2..0..1....0..0..1..2..0..2....0..0..1..2..3..1....0..0..1..2..1..2
..0..0..2..3..1..3....0..0..2..3..1..3....0..0..3..1..0..3....0..0..2..1..2..3
..3..2..0..2..3..1....2..3..3..1..2..1....3..2..2..3..1..0....1..3..0..3..1..0
..2..1..2..3..1..3....1..3..3..2..1..0....1..2..2..1..2..3....3..2..3..1..3..2
CROSSREFS
Sequence in context: A183730 A341572 A199254 * A089457 A265631 A352433
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved