login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A094386 a(n) = floor(sqrt(3)*2^(n-1)). 6
1, 3, 6, 13, 27, 55, 110, 221, 443, 886, 1773, 3547, 7094, 14188, 28377, 56755, 113511, 227023, 454046, 908093, 1816186, 3632373, 7264747, 14529495, 29058990, 58117981, 116235962, 232471924, 464943848, 929887696, 1859775393, 3719550786 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = A022838(2^(n-1)). - R. J. Mathar, Oct 22 2011

MATHEMATICA

Table[Floor[Sqrt[3] 2^(n-1)], {n, 40}] (* Vincenzo Librandi, Sep 20 2017 *)

PROG

(MAGMA) [Floor(2^(n-1)*Sqrt(3)): n in [1..40]]; // Vincenzo Librandi, Sep 20 2017

(PARI) a(n) = floor(sqrt(3)*2^(n-1)); \\ Michel Marcus, Sep 20 2017

CROSSREFS

Sequence in context: A065830 A055143 A092539 * A267604 A099036 A131246

Adjacent sequences:  A094383 A094384 A094385 * A094387 A094388 A094389

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Jun 03 2004

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 20 04:42 EDT 2019. Contains 322294 sequences. (Running on oeis4.)