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A202031
Number of nX6 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing
1
4, 281, 44300, 8249505, 1387552127, 197324899476, 23770010642604, 2467219447235558, 224555987749683857, 18190414439380817926, 1327557199228235157815, 88165919561636605868645
OFFSET
1,1
COMMENTS
Column 6 of A202033
LINKS
EXAMPLE
Some solutions for n=3
.-1.-1.-1.-1..0..1...-1.-1.-1.-1..0..1...-1.-1..0..0..1..1...-1.-1.-1..0..1..1
.-1.-1..1..1..0..1...-1..0..1..1..1.-1...-1..0.-1..0..1..1...-1..1..1.-1.-1..1
..0..1..0..0..0..1....0..0..0..1..1..0...-1..1..1.-1.-1..1....1..1..1.-1.-1..0
CROSSREFS
Sequence in context: A134786 A290225 A190635 * A074309 A113256 A259495
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 09 2011
STATUS
approved