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A058051
a(n) = F(F(F(n))), where F is a Fibonacci number (A000045).
4
0, 1, 1, 1, 1, 5, 10946, 2211236406303914545699412969744873993387956988653
OFFSET
0,6
COMMENTS
a(8) = 1695216512..7257812353 has 2288 decimal digits and a(9) = 3525796792..4659808333 has 1191833 decimal digits. - Alois P. Heinz, Nov 11 2015
MAPLE
F:= n-> (<<0|1>, <1|1>>^n)[1, 2]:
a:= n-> F(F(F(n))):
seq(a(n), n=0..7); # Alois P. Heinz, Nov 11 2015
MATHEMATICA
F[0] = 0; F[1] = 1; F[n_] := F[n] = F[n - 1] + F[n - 2]; Table[ F[ F[ F[n] ] ], {n, 0, 10} ]
Table[Nest[Fibonacci, n, 3], {n, 0, 8}] (* Harvey P. Dale, Feb 09 2018 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Nov 18 2000
EXTENSIONS
Offset corrected by Alois P. Heinz, Nov 11 2015
STATUS
approved