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A222742
Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
1
0, 32, 2438, 125094, 6821264, 413021606, 24065512554, 1471765337998, 87152464030990, 5404644628233066, 322906836991829172, 20211764295806702232, 1215888385906731445434, 76597296936236782196484
OFFSET
1,2
COMMENTS
Column 3 of A222747
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..2....0..1..0....0..1..2....0..1..0....0..1..2....0..1..1
..1..2..2....1..3..2....2..1..2....3..2..3....2..2..1....3..3..1....2..3..2
..3..0..3....3..1..0....1..2..1....1..3..1....0..1..0....3..3..2....1..1..2
CROSSREFS
Sequence in context: A254458 A185968 A247999 * A077143 A198284 A230573
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 04 2013
STATUS
approved