2182950

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=40A123244
• Number of rooted binary phylogenetic trees with n leaves and minimal Sackin tree balance index.at n=10A344934