9135630

Appears in sequences

• Number of n X n matrices with nonnegative entries and every row and column sum 2.at n=7A000681
• Number of 7 X 7 stochastic matrices of integers.at n=2A008552
• Number of n X n 0..2 arrays with row sums 12 and column sums 12.at n=6A172620
• Number of 7*n X 7 0..2 arrays with row sums 2 and column sums 2*n.at n=0A172711
• Number A(n,k) of n X n nonnegative integer matrices with all row and column sums equal to k; square array A(n,k), n >= 0, k >= 0, read by antidiagonals.at n=52A257493
• Irregular triangle read by rows where T(n,k) is the number of d X d non-normal semi-magic squares with d = A027750(n,k) and sum of all entries equal to n.at n=39A321725