A099486
Expansion of x/((1 + x^2)*(1 - 4*x + x^2)).
Original entry on oeis.org
0, 1, 4, 14, 52, 195, 728, 2716, 10136, 37829, 141180, 526890, 1966380, 7338631, 27388144, 102213944, 381467632, 1423656585, 5313158708, 19828978246, 74002754276, 276182038859, 1030725401160, 3846719565780, 14356152861960
Offset: 0
A099487
Expansion of (1-3x+x^2)/((1+x^2)(1-4x+x^2)).
Original entry on oeis.org
1, 1, 3, 14, 53, 195, 727, 2716, 10137, 37829, 141179, 526890, 1966381, 7338631, 27388143, 102213944, 381467633, 1423656585, 5313158707, 19828978246, 74002754277, 276182038859, 1030725401159, 3846719565780, 14356152861961
Offset: 0
A099489
Expansion of (1-x+x^2)/((1+x^2)(1-4x+x^2)).
Original entry on oeis.org
1, 3, 11, 42, 157, 585, 2183, 8148, 30409, 113487, 423539, 1580670, 5899141, 22015893, 82164431, 306641832, 1144402897, 4270969755, 15939476123, 59486934738, 222008262829, 828546116577, 3092176203479, 11540158697340
Offset: 0
-
CoefficientList[Series[(1-x+x^2)/((1+x^2)(1-4x+x^2)),{x,0,30}],x] (* or *_)
LinearRecurrence[{4,-2,4,-1},{1,3,11,42},30] (* Harvey P. Dale, Dec 28 2019 *)
Showing 1-3 of 3 results.
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