125757

Appears in sequences

• a(n) = Sum_{i=0..n} Sum_{j=0..i} T(i,j), T given by A026519.at n=13A026533
• The determinant of an n X n Toeplitz matrix M(n) whose first row consists of successive positive integer numbers 2*n - 1, n - 1, ..., 1 and whose first column consists of 2*n - 1, 2*n - 2, ..., n.at n=5A323254