A093379 Expansion of x(1-2x-2x^2)/((1+x)(1-2x)(1-3x)).
0, 1, 2, 5, 12, 31, 82, 225, 632, 1811, 5262, 15445, 45652, 135591, 404042, 1206665, 3609072, 10805371, 32372422, 97029885, 290914892, 872395151, 2616486402, 7848061105, 23541387112, 70618568931, 211844521982, 635511196325
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (4,-1,-6).
Crossrefs
Cf. A087432.
Programs
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Mathematica
CoefficientList[Series[x (1-2x-2x^2)/((1+x)(1-2x)(1-3x)),{x,0,30}],x] (* or *) LinearRecurrence[{4,-1,-6},{0,1,2,5},40] (* Harvey P. Dale, May 10 2019 *)
Comments