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A078067
Expansion of (1-x)/(1+2*x+2*x^2-2*x^3).
0
1, -3, 4, 0, -14, 36, -44, -12, 184, -432, 472, 288, -2384, 5136, -4928, -5184, 30496, -60480, 49600, 82752, -385664, 705024, -473216, -1234944, 4826368, -8129280, 4135936, 17639424, -59809280, 92611584, -30325760, -244190208, 734255104, -1040781312, 124672000, 3300728832
OFFSET
0,2
FORMULA
G.f.: (1-x)/(1+2*x+2*x^2-2*x^3).
a(n) = -2*a(n-1) - 2*a(n-2) + 2*a(n-3). - Wesley Ivan Hurt, Nov 17 2022
MATHEMATICA
CoefficientList[Series[(1-x)/(1+2x+2x^2-2x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{-2, -2, 2}, {1, -3, 4}, 40] (* Harvey P. Dale, May 03 2018 *)
CROSSREFS
Sequence in context: A113035 A374195 A099447 * A192442 A009126 A322278
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved