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Floor(sqrt(11*n)).
2

%I #13 Sep 08 2022 08:46:01

%S 0,3,4,5,6,7,8,8,9,9,10,11,11,11,12,12,13,13,14,14,14,15,15,15,16,16,

%T 16,17,17,17,18,18,18,19,19,19,19,20,20,20,20,21,21,21,22,22,22,22,22,

%U 23,23,23,23,24,24,24,24,25,25,25,25,25,26

%N Floor(sqrt(11*n)).

%H Vincenzo Librandi, <a href="/A202307/b202307.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) = A000196(11n).

%t Table[Floor[Sqrt[11n]],{n,0,80}].

%o (Magma) [Floor(Sqrt(11*n)) : n in [0..80]];

%o (PARI) a(n)=sqrtint(11*n) \\ _Charles R Greathouse IV_, Jan 17 2012

%Y Cf. A172471, A202304, A202305, A202306.

%K nonn,easy

%O 0,2

%A _Vincenzo Librandi_, Jan 17 2012