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A199200
Number of nX7 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
41, 14479, 3366282, 351517665, 533423159945
OFFSET
1,1
COMMENTS
Column 7 of A199201
EXAMPLE
Some solutions for n=4
..0..0..1..2..3..2..3....0..0..1..2..1..2..1....0..0..1..2..3..2..1
..0..0..2..3..1..3..2....0..0..2..3..2..3..2....0..0..2..3..1..3..2
..1..2..1..2..3..1..0....1..3..0..2..3..2..3....1..3..1..0..3..2..1
..0..1..3..0..1..2..3....0..1..3..0..1..3..1....0..1..2..3..0..3..2
CROSSREFS
Sequence in context: A106203 A289416 A199255 * A198602 A214338 A084275
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved