2030271480

Appears in sequences

• a(n) is the number of n X n matrices of 0's, 1's and -1's in which the entries in each row or column sum to 1.at n=5A050204
• Number of n X n 0..2 arrays with row sums 5 and column sums 5.at n=5A172625
• Number of n X n 0..2 arrays with row sums 7 and column sums 7.at n=5A172628
• Number of 6*n X 6 0..2 arrays with row sums 5 and column sums 5*n.at n=0A172706