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A201845
Number of zero-sum nX6 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor
0
9, 1897, 259811, 47249907, 8964073263, 1759241274383, 350714115254871
OFFSET
1,1
COMMENTS
Column 6 of A201847
EXAMPLE
Some solutions for n=2
..1.-1.-1.-1..1..0....1.-1.-1..0..0.-1...-1.-1..0..1..1..0...-1..0..1..1.-1..0
..1.-1.-1..1..1..0....1.-1..1..1..1.-1....1..1..0.-1.-1..0...-1..0..1..1.-1..0
CROSSREFS
Sequence in context: A218415 A194135 A114224 * A218692 A024125 A232684
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2011
STATUS
approved