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A022354 Fibonacci sequence beginning 0, 20. 2
0, 20, 20, 40, 60, 100, 160, 260, 420, 680, 1100, 1780, 2880, 4660, 7540, 12200, 19740, 31940, 51680, 83620, 135300, 218920, 354220, 573140, 927360, 1500500, 2427860, 3928360, 6356220, 10284580 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (1, 1).

FORMULA

G.f.: 20*x/(1-x-x^2). - Philippe Deléham, Nov 20 2008

a(n) = 20*A000045(n). - G. C. Greubel, Aug 26 2017

MATHEMATICA

a={}; b=0; c=20; AppendTo[a, b]; AppendTo[a, c]; Do[b=b+c; AppendTo[a, b]; c=b+c; AppendTo[a, c], {n, 4!}]; a (* Vladimir Joseph Stephan Orlovsky, Sep 17 2008 *)

Table[20*Fibonacci[n], {n, 0, 50}] (* or *) LinearRecurrence[{1, 1}, {0, 20}, 50] (* G. C. Greubel, Aug 26 2017 *)

PROG

(PARI) for(n=0, 50, print1(20*fibonacci(n), ", ")) \\ G. C. Greubel, Aug 26 2017

CROSSREFS

Sequence in context: A291522 A278830 A040381 * A165841 A222958 A212284

Adjacent sequences:  A022351 A022352 A022353 * A022355 A022356 A022357

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 21 04:02 EDT 2017. Contains 293679 sequences.