297200

Appears in sequences

• Number of n X n 0-1 matrices with all column and row sums equal to 3.at n=6A001501
• Triangle read by rows: T(n,k) (n >= 0, 0 <= k <= n) gives number of {0,1} n X n matrices with all row and column sums equal to k.at n=24A008300
• Number of 2n X 2n 0-1 matrices with n ones in each row and each column.at n=3A058527
• Number of 2*n X 6 binary arrays with row sums 3 and column sums n.at n=3A172556
• 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.at n=24A376935