A005370 a(n) = Fibonacci(Fibonacci(n+1) + 1). (Formerly M0891)

1, 1, 2, 3, 8, 34, 377, 17711, 9227465, 225851433717, 2880067194370816120, 898923707008479989274290850145, 3577855662560905981638959513147239988861837901112, 4444705723234237498833973519982908519933430818636409166351397897095281987215864

Offset

0,3

References

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Alois P. Heinz, Table of n, a(n) for n = 0..18

Maple

with(combinat, fibonacci): A005370 := n -> fibonacci(fibonacci(n+1)+1);
# Alternative:
F:= n-> (<<0|1>, <1|1>>^n)[1, 2]:
a:= n-> F(F(n+1)+1):
seq(a(n), n=1..14);  # Alois P. Heinz, Nov 05 2015

Mathematica

Table[Fibonacci[Fibonacci[n+1] +1], {n, 0, 14}] (* Vladimir Joseph Stephan Orlovsky, Feb 08 2012 *)

Prog

(Magma) [Fibonacci(Fibonacci(n+1)+1): n in [0..17]]; // Vincenzo Librandi, Apr 20 2011
(SageMath) [fibonacci(fibonacci(n+1) +1) for n in range(15)] # G. C. Greubel, Nov 14 2022

Crossrefs

Cf. A000045, A007570.

Sequence in context: A340495 A084908 A078742 * A112866 A041657 A191274

Adjacent sequences: A005367 A005368 A005369 * A005371 A005372 A005373

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from David W. Wilson

Description corrected by Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Nov 17 2002

Status

approved