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A049526 Number of possible sets {{row sums}, {column sums}} of a 2n X 2n matrix with entries from {0,1,-1} and all row and column sums distinct. 2
2, 6, 22, 94, 458, 2512, 15354, 103436, 758848 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
It is known that such matrices of size (2n+1) X (2n+1) do not exist.
LINKS
CROSSREFS
Sequence in context: A109153 A030453 A001861 * A187251 A193763 A301385
KEYWORD
nonn,nice,hard,more
AUTHOR
STATUS
approved

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Last modified July 15 19:27 EDT 2024. Contains 374334 sequences. (Running on oeis4.)