A077822 Expansion of (1-x)^(-1)/(1-3*x-3*x^2-2*x^3).

1, 4, 16, 63, 246, 960, 3745, 14608, 56980, 222255, 866922, 3381492, 13189753, 51447580, 200674984, 782747199, 3053161710, 11909076696, 46452209617, 181190182360, 706745329324, 2756710954287, 10752749215554, 41941871168172, 163597283059753, 638122961114884