A200561 Expansion of -2*x / ( (2*x-1)*(4*x^2+3*x+1) ).

2, -2, 6, 6, -10, 70, -42, 102, 374, -506, 2070, -90, 182, 16198, -16554, 50406, 46070, -77690, 573078, -359898, 884534, 2980294, -4090410, 17127270, -1465738, 2996998, 131089686, -136821594, 422976950, 352097350, -600716202, 4688726502, -3073380106, 7645103494, 23717948310, -33014782170, 141611506742

Offset: 1

Author

Krishnamurthy Balasubraniam, Nov 19 2011

Keywords

• sign
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (-1,2,8).

Formula

a(n) = -a(n-1) +2*a(n-2) +8*a(n-3).

7*a(n) = 2^(n+1) -2*(-1)^n*(2*A049072(n-1)+A049072(n)). - R. J. Mathar, Dec 01 2011

Extensions

Definition from R. J. Mathar, Nov 19 2011