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A005371 a(n) = L(L(n)), where L(n) are Lucas numbers A000032.
(Formerly M3315)
5
3, 1, 4, 7, 29, 199, 5778, 1149851, 6643838879, 7639424778862807, 50755107359004694554823204, 387739824812222466915538827541705412334749, 19679776435706023589554719270187913247121278789615838446937339578603 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

T. Koshy (2001), Fibonacci and Lucas Numbers with Applications, John Wiley & Sons, New York, 511-516

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

LINKS

T. D. Noe, Table of n, a(n) for n=0..15

MAPLE

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

a:= n-> L(L(n)):

seq(a(n), n=0..14);  # Alois P. Heinz, Jun 01 2016

MATHEMATICA

l[n_] := l[n] = l[n - 1] + l[n - 2]; l[0] = 2; l[1] = 1; Table[l[l[n]], {n, 0, 12}]

Table[LucasL[LucasL[n]], {n, 0, 20}] (* G. C. Greubel, Dec 21 2017 *)

PROG

(MAGMA) [ Lucas(Lucas(n)): n in [0..20]]; // Vincenzo Librandi, Apr 16 2011

(PARI) {lucas(n) = fibonacci(n+1) + fibonacci(n-1)};

for(n=0, 20, print1(lucas(lucas(n)), ", ")) \\ G. C. Greubel, Dec 21 2017

CROSSREFS

Cf. A000032, A005372, A007570, A068096, A068098.

Sequence in context: A272439 A217151 A081255 * A210739 A193605 A193667

Adjacent sequences:  A005368 A005369 A005370 * A005372 A005373 A005374

KEYWORD

easy,nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Mario Catalani (mario.catalani(AT)unito.it), Mar 14 2003

Offset changed Feb 28 2007

STATUS

approved

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Last modified February 21 15:31 EST 2019. Contains 320374 sequences. (Running on oeis4.)