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A201983
Number of n X n zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing
0
1, 77, 134217, 7375608084, 13189629907532856
OFFSET
1,2
COMMENTS
Diagonal of A201989
EXAMPLE
Some solutions for n=3
.-3.-3..1...-3.-1..0...-3..1..3...-3.-3..1...-3.-1..2...-3..0..2...-1.-1..0
..2..2.-2....0.-1..2...-3..2..0...-3..2..3...-1..1..0...-1..2.-2...-1..2.-3
..2..3.-2....2.-1..2...-2.-1..3...-2..2..3....3.-2..1....1.-1..2....2..2..0
CROSSREFS
Sequence in context: A271244 A271245 A196543 * A278370 A278654 A331630
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 07 2011
STATUS
approved