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A199351
Number of nX2 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
1
1, 1, 45, 105, 4251, 9175, 447916, 958259, 50233308, 106354160, 5897448012, 12409253763, 715649665145, 1498983975673, 89063549460702, 185913744482294, 11306002322078532, 23537550026903929, 1458334886366979145
OFFSET
1,3
COMMENTS
Column 2 of A199356
LINKS
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....1..2....2..2....2..0....2..0....2..1....2..3....0..2....2..3
..3..3....1..0....2..3....1..3....3..2....2..3....3..3....3..0....2..1....3..2
..2..0....2..3....3..1....0..3....3..1....1..3....0..2....2..1....3..3....1..0
CROSSREFS
Sequence in context: A332593 A144486 A376892 * A199517 A180971 A043442
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved