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 A038827 #8 Mar 21 2021 22:07:53
%S A038827 664579,606028,587252,575795,567480,560981,555949,551318,547572,
%T A038827 544501,541854,538339,536539,534012,532197,530062,528625,527302,
%U A038827 525088,523464,522689,520914,520033,518971,517774,516542,515524,514685,513594,512662
%N A038827 Number of primes between n*10^7 and (n+1)*10^7.
%H A038827 Jon E. Schoenfield, <a href="/A038827/b038827.txt">Table of n, a(n) for n = 0..9999</a>
%t A038827 Table[ PrimePi[ (n + 1)*10^7 ] - PrimePi[ n*10^7 ], {n, 0, 40} ]
%Y A038827 Cf. A038823, A038824, A038825, A038826, A038828, A038829, A038830, A038831, A038832, A080132.
%K A038827 nonn
%O A038827 0,1
%A A038827 _Jeff Burch_
%E A038827 More terms from _Robert G. Wilson v_, Aug 27 2001