53487

Appears in sequences

• Triangle read by rows: coefficients of expansion in powers of x of the polynomials defined by p(n, x) = (2*n - 1)*p(n - 1, x) + (n - 1)^2*x^2*p(n - 2, x).at n=33A123244
• Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0.at n=9A255785