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A201844
Number of zero-sum nX5 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor
1
1, 411, 17031, 1566319, 109797321, 8964073263, 697824874477, 56238345975057, 4510071758583443, 365508148420971423, 29684298137697156807, 2422133463372341456079, 198166150735435791683617
OFFSET
1,2
COMMENTS
Column 5 of A201847
LINKS
EXAMPLE
Some solutions for n=3
..1.-1..0..1.-1...-1..1..0..0..0...-1.-1.-1..1..0....0..1..1..1..0
..1.-1..0..1.-1...-1..1.-1.-1..1...-1..0..1..1..0....0.-1.-1.-1..0
..0..0..0..0..0....0..0.-1..1..1...-1..0..1..1..0....1..1.-1.-1..0
CROSSREFS
Sequence in context: A187991 A090123 A055018 * A105211 A081378 A234190
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2011
STATUS
approved