|
%I #15 Jul 01 2023 16:25:14
%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.
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2, 3).
%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
|
