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A223049
Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
1
0, 44, 1682, 101573, 4505726, 286019636, 13029003006, 847775163675, 39163069348499, 2586615582072818, 120546656751917002, 8041164730409837733, 377031919338288517436, 25328506526109972349940, 1192869061178928489347148
OFFSET
1,2
COMMENTS
Column 3 of A223052
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1....0..0..0....0..1..1....0..1..2....0..1..2....0..1..0....0..0..1
..2..3..2....1..0..2....2..1..0....2..2..3....3..2..2....2..3..1....2..1..3
..0..0..1....1..0..3....2..3..1....0..2..1....2..1..0....2..0..3....3..1..0
CROSSREFS
Sequence in context: A130645 A004340 A231262 * A278793 A004295 A162882
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2013
STATUS
approved