138080

Appears in sequences

• Triangle T(n,k) read by rows: number of k X k triangular (0,1)-matrices with exactly n entries equal to 1 and no zero rows or columns.at n=73A137252
• Number of n X n arrays of squares of integers with every (n-1) X (n-1) subblock summing to 23.at n=1A159412
• Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=15A252109