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A321573 Row sums of A321624. 1
1, 2, 8, 22, 68, 202, 608, 1822, 5468, 16402, 49208, 147622, 442868, 1328602, 3985808, 11957422, 35872268, 107616802, 322850408, 968551222, 2905653668, 8716961002, 26150883008, 78452649022, 235357947068, 706073841202, 2118221523608, 6354664570822, 19063993712468 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

FORMULA

From Philippe Deléham, Feb 05 2020: (Start)

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

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

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

MATHEMATICA

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

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

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

CROSSREFS

Cf. A321624, A321620.

Sequence in context: A265951 A178159 A262720 * A137103 A089586 A339302

Adjacent sequences:  A321570 A321571 A321572 * A321574 A321575 A321576

KEYWORD

nonn

AUTHOR

Peter Luschny, Nov 22 2018

STATUS

approved

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Last modified August 17 15:14 EDT 2022. Contains 356189 sequences. (Running on oeis4.)