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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

%I #11 Mar 04 2021 07:23:01

%S 2,6,22,94,458,2512,15354,103436,758848

%N 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.

%C It is known that such matrices of size (2n+1) X (2n+1) do not exist.

%Y Cf. A049475, A049527.

%K nonn,nice,hard,more

%O 1,1

%A _Michael Kleber_