This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A072631 #16 Sep 08 2022 08:45:06
%S A072631 0,1,0,1,3,4,6,0,1,3,4,5,7,8,10,12,14,16,17,19,0,2,3,4,5,6,7,9,10,12,
%T A072631 13,14,16,17,19,21,22,24,25,27,29,30,32,34,36,38,39,41,43,45,47,49,51,
%U A072631 53,0,1,2,3,4,5,6,7,9,10,11,12,13,14,16,17,18,19,21,22,23,25,26,27,29
%N A072631 Floor( n*log(n) ) mod n.
%C A072631 Compare with A004648 because prime(n) ~ n * log(n).
%H A072631 Vincenzo Librandi, <a href="/A072631/b072631.txt">Table of n, a(n) for n = 1..1000</a>
%t A072631 Table[Floor[Mod[n*Log[n],n]],{n,80}] (* _Harvey P. Dale_, Jun 29 2014 *)
%o A072631 (PARI) a(n)=floor(n*log(n))%n \\ _Charles R Greathouse IV_, Aug 01 2011
%o A072631 (Magma) [Floor(n*Log(n)) mod n: n in [1..100]]; // _Vincenzo Librandi_, Jun 30 2014
%Y A072631 Cf. A004648, A072608, A072609, A072610, A072630.
%K A072631 nonn
%O A072631 1,5
%A A072631 _Labos Elemer_, Jun 28 2002