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A222850
Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order
1
2, 51, 737, 19446, 292257, 7998180, 124148448, 3439829096, 54306296841, 1515901033301, 24205923008005, 678825974471631, 10927863709310867, 307435863252751539, 4979572918586911445, 140414743437294171876
OFFSET
1,1
COMMENTS
Column 3 of A222853
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..2....0..1..2....0..1..2....0..1..0....0..1..0....0..1..1
..1..2..1....1..2..2....2..1..0....1..1..0....2..0..1....2..0..2....0..2..0
..2..0..1....2..1..0....1..2..0....0..1..2....1..2..2....1..2..2....2..0..1
CROSSREFS
Sequence in context: A180110 A037058 A106042 * A089304 A210907 A099368
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 07 2013
STATUS
approved