A172325 Floor(n*(sqrt(7)+sqrt(3))).

0, 4, 8, 13, 17, 21, 26, 30, 35, 39, 43, 48, 52, 56, 61, 65, 70, 74, 78, 83, 87, 91, 96, 100, 105, 109, 113, 118, 122, 126, 131, 135, 140, 144, 148, 153, 157, 161, 166, 170, 175, 179, 183, 188, 192, 197, 201, 205, 210, 214, 218

Offset

0,2

Comments

Also integer part of n*4.3778021186..., where the constant is the largest root of x^4 -20*x^2 +16.

Links

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

Mathematica

With[{c = Sqrt[7] + Sqrt[3]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)

Prog

(Magma) [Floor(n*(Sqrt(7)+Sqrt(3))): n in [0..60]];

Crossrefs

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

Sequence in context: A311853 A311854 A311855 * A207673 A311856 A311857

Adjacent sequences: A172322 A172323 A172324 * A172326 A172327 A172328

Keyword

nonn,easy,less

Author

Vincenzo Librandi, Feb 01 2010

Status

approved