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A202032 Number of nX7 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing 0
4, 555, 207562, 108479344, 54711391946, 23770010642604, 8770728360813539, 2783263135495226169, 772297911415160439452, 190197136552795434910476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A202033

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Sequence in context: A159367 A012770 A332154 * A267066 A159530 A274470

Adjacent sequences:  A202029 A202030 A202031 * A202033 A202034 A202035

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 09 2011

STATUS

approved

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Last modified June 25 07:37 EDT 2022. Contains 354835 sequences. (Running on oeis4.)