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A223099
Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
1
0, 24, 546, 13416, 255216, 6939648, 137988216, 3821347968, 77212900320, 2167927320192, 44216000738976, 1253102341234176, 25727713443075456, 733955159958484992, 15142169638905698688, 434105972073233465856
OFFSET
1,2
COMMENTS
Column 3 of A223104
LINKS
EXAMPLE
Some solutions for n=3
..0..1..2....0..1..1....0..1..0....0..1..2....0..1..2....0..1..0....0..1..2
..0..2..0....0..0..1....2..1..0....0..2..2....0..1..2....0..2..2....0..2..2
..2..2..1....1..2..0....1..0..2....2..1..0....2..2..2....1..0..0....0..2..0
CROSSREFS
Sequence in context: A121905 A192835 A235118 * A187671 A362357 A162810
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2013
STATUS
approved