68938800

Appears in sequences

• Number of n X n 0-1 matrices with all column and row sums equal to 3.at n=7A001501
• 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=31A008300
• 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=32A008300
• Number of n X n (0,1) matrices with all column and row sums equal to 4.at n=7A058528
• Number of 7*n X 7 0..1 arrays with row sums 3 and column sums 3*n.at n=0A172608