Array read by antidiagonals: T(n,k) is the number of 2*n X 2*k binary matrices with all row sums k and column sums n.

A376935

Array read by antidiagonals: T(n,k) is the number of 2*n X 2*k binary matrices with all row sums k and column sums n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =20a(12) =90a(13) =20a(14) =1a(15) =1a(16) =70a(17) =1860a(18) =1860a(19) =70a(20) =1a(21) =1a(22) =252a(23) =44730a(24) =297200a(25) =44730a(26) =252a(27) =1a(28) =1a(29) =924

External references