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A202046 Number of zero-sum nX7 -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors 0
393, 37311, 1067983, 49553277, 2229078023, 108356007319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A202047

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=2

..1.-1.-1..1.-1.-1..1...-1.-1..1.-1..1..0.-1....0.-1.-1..0..1.-1.-1

.-1..1..1..1..1.-1.-1....0..0..1.-1..1..0..1....1..1..0..0..1..1.-1

CROSSREFS

Sequence in context: A201815 A201554 A172636 * A172737 A172813 A172872

Adjacent sequences:  A202043 A202044 A202045 * A202047 A202048 A202049

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 10 2011

STATUS

approved

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Last modified August 12 04:28 EDT 2022. Contains 356067 sequences. (Running on oeis4.)