247552

Appears in sequences

• Number of n X n 0..1 arrays with corresponding row and column sums equal.at n=5A229865
• T(n,k)=Number of n X n 0..k arrays with corresponding row and column sums equal.at n=14A229870
• Number of 5X5 0..n arrays with corresponding row and column sums equal.at n=0A229872
• G.f. A(x) satisfies: Sum_{n>=1} (x + (-1)^n*A(x))^n = 0.at n=7A317998