128624

Appears in sequences

• A triangular sequence of three back recursive polynomial that are Hermite H(x,n) like and alternating orthogonal on domain {-Infinity,Infinity} and weight function Exp[ -x^2/2]: P(x, n) = 2*x*P(x, n - 1) - n*P(x, n - 2) + 4*x^3*P(x, n - 3).at n=61A138090
• Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155347
• a(n) = 3*n^3 - 1.at n=35A345701