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, 6, 22, 94, 458, 2512, 15354, 103436, 758848

Offset

1,1

Comments

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

Links

Table of n, a(n) for n=1..9.

Crossrefs

Cf. A049475, A049527.

Sequence in context: A109153 A030453 A001861 * A187251 A193763 A301385

Adjacent sequences: A049523 A049524 A049525 * A049527 A049528 A049529

Keyword

nonn,nice,hard,more

Author

Michael Kleber

Status

approved