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 A060304 #20 Feb 19 2014 02:27:14
%S A060304 0,0,3,6,15,19,37,47,69,82,113,139,180,216,244,300,381,423,486,553,
%T A060304 638,726,820,887,1029,1152,1256,1376,1527,1659,1794,1992,2156,2357,
%U A060304 2517,2739,2909,3085,3365,3627,3933,4200,4380,4687,4960,5313,5547,5917,6395
%N A060304 Number of primes below n^3 does not exceed n times the number of primes below n^2.
%H A060304 Vincenzo Librandi, <a href="/A060304/b060304.txt">Table of n, a(n) for n = 0..1000</a>
%H A060304 S. Segal, <a href="http://dx.doi.org/10.1090/S0002-9947-1962-0139586-4">On π(x+y)<=π(x)+π(y)</a>, Transactions American Mathematical Society, 104 (1962), 523-527.
%F A060304 a(n) = n*pi(n*n) - pi(n*n*n). - _Jonathan Sondow_, Feb 17 2014
%F A060304 a(n) = n*A038107(n) - A038098(n). - _Michel Marcus_, Feb 17 2014
%e A060304 n=10, 10*pi(100)=250, pi(1000)=168, a(10)=250-168=82.
%t A060304 Table[n*PrimePi[n^2]-PrimePi[n^3], {n, 1, 100}]
%Y A060304 Cf. A060199, A060208, A000720.
%K A060304 nonn
%O A060304 0,3
%A A060304 _Labos Elemer_, Mar 26 2001