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A144701 Hankel transform of expansion of 1/c(x)^3, c(x) the g.f. of A000108. 0

%I

%S 1,-9,26,-25,-36,133,-132,-81,375,-374,-144,806,-805,-225,1480,-1479,

%T -324,2451,-2450,-441,3773,-3772,-576,5500,-5499,-729,7686,-7685,-900,

%U 10385,-10384,-1089,13651,-13650,-1296,17538,-17537

%N Hankel transform of expansion of 1/c(x)^3, c(x) the g.f. of A000108.

%C Hankel transform of A115142.

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (-4,-10,-16,-19,-16,-10,-4,-1).

%F G.f.: (1+x)(1-x)(1-5x+x^2)/(1+x+x^2)^4;

%F a(n)=-(2n^3+9n^2+7n-6)*cos(2*pi*n/3)/6-sqrt(3)*(2n^3+21n^2+55n+42)*sin(2*pi*n/3)/18;

%K easy,sign

%O 0,2

%A _Paul Barry_, Sep 19 2008

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Last modified June 16 16:09 EDT 2021. Contains 345063 sequences. (Running on oeis4.)