A141352 Expansion of (1-2x-5x^2-7x^3+x^6)/((1-x)(1-x^3)^2).

1, -1, -6, -11, -15, -25, -35, -41, -56, -71, -79, -99, -119, -129, -154, -179, -191, -221, -251, -265, -300, -335, -351, -391, -431, -449, -494, -539, -559, -609, -659, -681, -736, -791, -815, -875, -935, -961, -1026, -1091, -1119

Offset: 0

Author

Paul Barry, Jun 27 2008

Keywords

• easy
• sign

Comments

Hankel transform of A141351.

Links

• Index entries for linear recurrences with constant coefficients, signature (1,0,2,-2,0,-1,1).

Programs

Mathematica

CoefficientList[Series[(1-2x-5x^2-7x^3+x^6)/ ((1-x)(1-x^3)^2), {x,0,50}],x] (* Harvey P. Dale, Mar 31 2011 *)

Formula

G.f.: (1-2x-5x^2-7x^3+x^6)/(1-x-2x^3+2x^4+x^6-x^7);