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A172328 a(n) = floor(n*(sqrt(11)+sqrt(3))). 1

%I #15 Sep 08 2022 08:45:50

%S 0,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,106,

%T 111,116,121,126,131,136,141,146,151,156,161,166,171,176,181,186,191,

%U 196,201,206,212,217,222,227,232,237,242,247,252

%N a(n) = floor(n*(sqrt(11)+sqrt(3))).

%C Also integer part of n*5.0486755979..., where the constant is the largest root of x^4 -28*x^2 +64.

%H Vincenzo Librandi, <a href="/A172328/b172328.txt">Table of n, a(n) for n = 0..1000</a>

%t With[{c = Sqrt[11] + Sqrt[3]}, Floor[c Range[0, 70]]] (* _Vincenzo Librandi_, Aug 01 2013 *)

%o (Magma) [Floor(n*(Sqrt(11)+Sqrt(3))): n in [0..60]];

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

%K nonn,easy,less

%O 0,2

%A _Vincenzo Librandi_, Feb 01 2010

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)