A091596 Expansion of x(1-2x^2)/(1-x-2x^2)^2.
0, 1, 2, 5, 12, 27, 62, 137, 304, 663, 1442, 3109, 6676, 14259, 30342, 64321, 135928, 286415, 601962, 1262173, 2640860, 5514731, 11495502, 23923065, 49710272, 103148807, 213754162, 442421397, 914668964, 1888990243, 3897285142
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (2,3,-4,-4).
Programs
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Mathematica
CoefficientList[Series[x (1-2x^2)/(1-x-2x^2)^2,{x,0,30}],x] (* or *) LinearRecurrence[{2,3,-4,-4},{0,1,2,5},40] (* Harvey P. Dale, Dec 01 2015 *)
Comments