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A172278 a(n) = floor(n*(sqrt(13)-sqrt(2))). 15
0, 2, 4, 6, 8, 10, 13, 15, 17, 19, 21, 24, 26, 28, 30, 32, 35, 37, 39, 41, 43, 46, 48, 50, 52, 54, 56, 59, 61, 63, 65, 67, 70, 72, 74, 76, 78, 81, 83, 85, 87, 89, 92, 94, 96, 98, 100, 102, 105, 107, 109, 111, 113, 116, 118, 120, 122, 124, 127, 129, 131, 133, 135, 138, 140 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This is the Beatty sequence for the constant 2.19133771309089424431753254326...

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

MAPLE

A172278 := proc(n)

    floor(n*(sqrt(13)-sqrt(2))) ;

end proc:

seq(A172278(n), n=0..30) ; # R. J. Mathar, Sep 04 2016

MATHEMATICA

With[{c = Sqrt[13] - Sqrt[2]}, Floor[c Range[0, 80]]] (* Vincenzo Librandi, Aug 02 2013 *)

PROG

(MAGMA) [Floor(n*(Sqrt(13)-Sqrt(2))): n in [0..80]]; // Vincenzo Librandi, Aug 02 2013

(PARI) for(n=0, 50, print1(floor(n*(sqrt(13)-sqrt(2))), ", ")) \\ G. C. Greubel, Jul 05 2017

CROSSREFS

Cf. A172264, A172266-A172270, A172272-A172277.

Similar to but strictly different from A276383.

Sequence in context: A246404 A246408 A182766 * A276383 A094390 A186289

Adjacent sequences:  A172275 A172276 A172277 * A172279 A172280 A172281

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jan 30 2010

STATUS

approved

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Last modified November 20 17:09 EST 2019. Contains 329337 sequences. (Running on oeis4.)