login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A022354
Fibonacci sequence beginning 0, 20.
3
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
OFFSET
0,2
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: A278830 A040381 A354569 * A302363 A165841 A222958
KEYWORD
nonn
STATUS
approved