A228177 Floor(n*(sqrt(6)+sqrt(5))).

0, 4, 9, 14, 18, 23, 28, 32, 37, 42, 46, 51, 56, 60, 65, 70, 74, 79, 84, 89, 93, 98, 103, 107, 112, 117, 121, 126, 131, 135, 140, 145, 149, 154, 159, 163, 168, 173, 178, 182, 187, 192, 196, 201, 206, 210, 215, 220, 224, 229, 234, 238, 243, 248, 253, 257, 262

Offset: 0

Author

Vincenzo Librandi, Aug 15 2013

Keywords

• nonn
• easy

Comments

a(n) = integer part of n*4.6855577..., where the constant is the largest root of x^4 -22*x^2 +1.

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(6)+Sqrt(5))): n in [0..60]];

Mathematica

With[{c = Sqrt[6] + Sqrt[5]}, Floor[c Range[0, 60]]]