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

Author

Vincenzo Librandi, Feb 01 2010

Keywords

• nonn
• easy
• less

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

Crossrefs

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

Programs

Magma

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

Mathematica

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