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A321573 Row sums of A321624. 1

%I

%S 1,2,8,22,68,202,608,1822,5468,16402,49208,147622,442868,1328602,

%T 3985808,11957422,35872268,107616802,322850408,968551222,2905653668,

%U 8716961002,26150883008,78452649022,235357947068,706073841202,2118221523608,6354664570822,19063993712468

%N Row sums of A321624.

%F From _Philippe Deléham_, Feb 05 2020: (Start)

%F G.f.: (1+x^2)/(1-2x-3*x^2).

%F a(0)=1, a(1)=2, a(2)=8, a(n)=2*a(n-1)+3*a(n-2) , for n>2.

%F a(0)=1, a(n) = (5*3^(n-1)-(-1)^(n-1))/2, for n>0 . (End)

%t (* The function RiordanSquare is defined in A321620. *)

%t Lucas = 1 + x*(1 + 2x)/(1 - x - x^2);

%t M = RiordanSquare[Lucas, 29]; Map[Total, M]

%Y Cf. A321624, A321620.

%K nonn

%O 0,2

%A _Peter Luschny_, Nov 22 2018

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Last modified October 1 09:13 EDT 2022. Contains 357140 sequences. (Running on oeis4.)