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A172330 Floor(n*(sqrt(13)+sqrt(11))). 1
0, 6, 13, 20, 27, 34, 41, 48, 55, 62, 69, 76, 83, 89, 96, 103, 110, 117, 124, 131, 138, 145, 152, 159, 166, 173, 179, 186, 193, 200, 207, 214, 221, 228, 235, 242, 249, 256, 263, 269, 276, 283, 290, 297, 304, 311, 318, 325, 332, 339, 346 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Also integer part of n*6.9221760658..., where the constant is the largest root of x^4 -48*x^2 +4.

LINKS

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

MATHEMATICA

With[{c = Sqrt[13] + Sqrt[11]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)

PROG

(MAGMA) [Floor(n*(Sqrt(13)+Sqrt(11))): n in [0..60]];

CROSSREFS

Cf. A110117, A172323-A172332, A172334, A172336-A172338.

Sequence in context: A043417 A031485 A004919 * A017053 A046040 A227359

Adjacent sequences:  A172327 A172328 A172329 * A172331 A172332 A172333

KEYWORD

nonn,easy,less

AUTHOR

Vincenzo Librandi, Feb 01 2010

STATUS

approved

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Last modified October 22 02:06 EDT 2017. Contains 293756 sequences.