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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A201847

LINKS

Table of n, a(n) for n=1..7.

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

Adjacent sequences:  A201842 A201843 A201844 * A201846 A201847 A201848

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 06 2011

STATUS

approved

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Last modified January 20 08:07 EST 2020. Contains 331081 sequences. (Running on oeis4.)