32133218304domain: NAppears in sequencesa(n) = (2/3) * 4^n * binomial(3*n, n).at n=7A036909Number of 10-D hypercubes in an n-dimensional hypercube.at n=14A172242Coefficients of successive polynomials formed by iterating f(x) = -1 + 2x^2. Irregular triangle read by rows.at n=28A321369a(n) = n^3 * 2^n * binomial(3*n, n) / 3.at n=8A378781