login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A061287 Integer part of square root of n-th Fibonacci number. 3
0, 1, 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 15, 19, 24, 31, 39, 50, 64, 82, 104, 133, 169, 215, 273, 348, 443, 563, 717, 912, 1160, 1475, 1877, 2388, 3037, 3863, 4915, 6252, 7952, 10116, 12867, 16368, 20820, 26484, 33688, 42852, 54508, 69336, 88197, 112188 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..500

EXAMPLE

a(10) = 7 because the 10th Fibonacci number is 55 and floor(sqrt(55)) = floor(7.4161) = 7.

MATHEMATICA

Array[Floor[Sqrt[Fibonacci[ # ]]]&, 5!, 0] (* Vladimir Joseph Stephan Orlovsky, Nov 10 2009 *)

PROG

(PARI) { g=0; f=1; for (n=0, 500, write("b061287.txt", n, " ", sqrtint(g)); s=f; f+=g; g=s ) } \\ Harry J. Smith, Jul 20 2009

(Sage) [floor(sqrt(fibonacci(n))) for n in range(0, 51)] # Zerinvary Lajos, Dec 01 2009

(Maxima) makelist(floor(sqrt(fib(n))), n, 0, 24); /* Emanuele Munarini, Jul 07 2011 */

(MAGMA) [Floor(Sqrt(Fibonacci(n))): n in [0..50]]; // Vincenzo Librandi, Sep 29 2017

CROSSREFS

Sequence in context: A280200 A052336 A318053 * A225500 A064651 A094991

Adjacent sequences:  A061284 A061285 A061286 * A061288 A061289 A061290

KEYWORD

nonn,easy

AUTHOR

Amarnath Murthy, Apr 25 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 11 18:59 EDT 2021. Contains 342888 sequences. (Running on oeis4.)