A078052 Expansion of (1-x)/(1+x+2*x^2+2*x^3).

1, -2, 0, 2, 2, -6, -2, 10, 6, -22, -10, 42, 22, -86, -42, 170, 86, -342, -170, 682, 342, -1366, -682, 2730, 1366, -5462, -2730, 10922, 5462, -21846, -10922, 43690, 21846, -87382, -43690, 174762, 87382, -349526, -174762, 699050, 349526, -1398102, -699050, 2796202, 1398102, -5592406, -2796202