A022848 Integer nearest nx, where x = sqrt(5).

0, 2, 4, 7, 9, 11, 13, 16, 18, 20, 22, 25, 27, 29, 31, 34, 36, 38, 40, 42, 45, 47, 49, 51, 54, 56, 58, 60, 63, 65, 67, 69, 72, 74, 76, 78, 80, 83, 85, 87, 89, 92, 94, 96, 98, 101, 103, 105, 107, 110, 112, 114, 116, 119, 121, 123, 125, 127, 130, 132, 134, 136

Offset

0,2

Comments

First differences in A214861. - Philippe Deléham, Mar 09 2013

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Formula

a(n+1) - a(n) = 2 or 3. - Philippe Deléham, Mar 09 2013

Mathematica

Flatten[Nearest[Range[0, 150], #]&/@(Sqrt[5]Range[0, 67])]  (* Harvey P. Dale, Feb 18 2011 *)

Prog

(Magma) [Round(n*Sqrt(5)): n in [0..60]]; // Vincenzo Librandi, Oct 22 2011
(PARI) vector(60, n, n--; round(n*sqrt(5))) \\ G. C. Greubel, Sep 29 2018

Crossrefs

Cf. A214861

Sequence in context: A122077 A029924 A125883 * A287723 A284589 A020904

Adjacent sequences: A022845 A022846 A022847 * A022849 A022850 A022851

Keyword

nonn,easy

Author

Clark Kimberling

Status

approved