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A050504 Integer part of n*log(n). 21

%I #21 May 05 2020 01:39:47

%S 0,1,3,5,8,10,13,16,19,23,26,29,33,36,40,44,48,52,55,59,63,68,72,76,

%T 80,84,88,93,97,102,106,110,115,119,124,129,133,138,142,147,152,156,

%U 161,166,171,176,180,185,190,195,200,205,210,215,220,225

%N Integer part of n*log(n).

%C Additive basis of order 3: all nonnegative integers can be written as a sum of three elements from this sequence. It appears that other than 7, 12, and 25, all numbers can be written as the sum of two members of this sequence. - _Charles R Greathouse IV_, Apr 23 2012

%H Charles R. Greathouse IV, <a href="/A050504/b050504.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Ab#basis_03">Index entries for sequences that are an additive basis</a>, order 3.

%F a(n)=floor(n*log(n)). - _Enrique PĂ©rez Herrero_, Jul 29 2009

%o (PARI) a(n)=n*log(n)\1 \\ _Charles R Greathouse IV_, Apr 23 2012

%Y See A050503 for more information.

%K nonn,easy

%O 1,3

%A _N. J. A. Sloane_, Dec 27 1999

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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)