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A201494 Number of nX6 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing 0
18, 36487, 168357815, 732383803600, 2571822263246639, 7383126698273869479 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A201496

LINKS

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

EXAMPLE

Some solutions for n=2

.-2.-1.-1..0..0..2...-2.-1.-1..1..1..1...-2.-1.-1..0..1..1...-2..0..0..0..1..2

.-1.-1.-1..2..2..1....1..0..0.-2..1..1....2.-2..2..2.-2..0...-2..0..2..2.-1.-2

CROSSREFS

Sequence in context: A296653 A255406 A123401 * A079303 A159445 A146548

Adjacent sequences:  A201491 A201492 A201493 * A201495 A201496 A201497

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 02 2011

STATUS

approved

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Last modified December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)