-71280

Appears in sequences

• Triangle of coefficients of even modified recursive orthogonal Hermite polynomials given in Hochstadt's book:P(x, n) = x*P(x, n - 1) - n*P(x, n - 2) ;A137286; P2(x,n)=P(x,n)+P(x,2*n): second type.at n=57A136587
• Triangular sequence of coefficients of p(x,t) = t*exp(3*x*t - t^2)/(exp(t) - 1).at n=12A137784
• E.g.f. A(x) satisfies A(A(x)) = x * exp(2*x).at n=7A199852