8785920domain: NAppears in sequencesExpansion of e.g.f. x^4*exp(x)^2.at n=13A052796Numerators of the average length of a line segment picked at random in the unit n-ball for odd n.at n=7A093530T(n, k) = (3^(-k)*n!*2^(n - 3*k))/(k!*(n - 3*k)!), for n >= 0 and 0 <= k <= floor(n/3). Triangle read by rows.at n=37A344915