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A130589 a(n) = F(F(n)-1), where F(n) = A000045(n) (the Fibonacci numbers). 1
1, 0, 0, 1, 1, 3, 13, 144, 6765, 3524578, 86267571272, 1100087778366101931, 343358302784187294870275058337, 1366619256256991435939546543402365995473880912459, 1697726516284295515651670644354144400761613511040643009353262085480136081475307 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

F(F(n+1)=A007570(n+1), namely, 1,1,2,5,21,233,...

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..19

EXAMPLE

a(1)=F(F(1)-1)=F(0)=0;

a(2)=F(F(2)-1)=F(0)=0;

a(3)=F(F(3)-1)=F(1)=1;

a(4)=F(F(4)-1)=F(2)=1;

a(5)=F(F(5)-1)=F(4)=3;

MAPLE

with(combinat): a:= proc(n) fibonacci(fibonacci(n)-1) end proc: seq(a(n), n = 0 .. 14);

# second Maple program:

F:= n-> (<<0|1>, <1|1>>^n)[1, 2]:

a:= n-> F(F(n)-1):

seq(a(n), n=0..14);  # Alois P. Heinz, Nov 07 2018

MATHEMATICA

Fibonacci[Fibonacci[Range[15]]-1] (* Harvey P. Dale, Feb 18 2018 *)

CROSSREFS

Cf. A000045.

Cf. A007570.

Sequence in context: A161677 A180276 A054933 * A041591 A001150 A108554

Adjacent sequences:  A130586 A130587 A130588 * A130590 A130591 A130592

KEYWORD

easy,nonn

AUTHOR

Philippe Lallouet (philip.lallouet(AT)wanadoo.fr), Jun 16 2007

EXTENSIONS

Edited by Emeric Deutsch, Jul 10 2007

a(0)=1 prepended by Alois P. Heinz, Nov 07 2018

STATUS

approved

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Last modified October 23 14:11 EDT 2019. Contains 328345 sequences. (Running on oeis4.)