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A159972 Row sums of number triangle A159971. 1

%I #4 Oct 25 2012 14:53:03

%S 1,-1,0,2,-7,21,-63,195,-624,2054,-6916,23712,-82498,290510,-1033410,

%T 3707850,-13402695,48760365,-178405155,656043855,-2423307045,

%U 8987427465,-33453694485,124936258125,-467995871775,1757900019099,-6619846420551

%N Row sums of number triangle A159971.

%F G.f.: (2c(-x)-1)/(1-xc(-x)^3)=(1-x+xc(-x))/(1+x)=(1-2x+sqrt(1+4x))/(2(1+x)), c(x) the g.f. of A000108.

%F Apparently n*a(n) +(5*n-6)*a(n-1) +2*(2*n-3)*a(n-2)=0. - _R. J. Mathar_, Oct 25 2012

%K easy,sign

%O 0,4

%A _Paul Barry_, Apr 28 2009

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Last modified June 22 22:13 EDT 2024. Contains 373619 sequences. (Running on oeis4.)