A077824 Expansion of (1-x)^(-1)/(1-3*x-2*x^2-2*x^3).

1, 4, 15, 56, 207, 764, 2819, 10400, 38367, 141540, 522155, 1926280, 7106231, 26215564, 96711715, 356778736, 1316190767, 4855553204, 17912598619, 66081283800, 243780155047, 899328229980, 3317707567635, 12239339472960, 45152090014111, 166570364123524