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 A080128 #11 Oct 28 2021 12:59:31 %S A080128 234057667276344607,460637655126005490,684559920583084690, %T A080128 906790515105576571,1127779923790184543,1347790196060095447, %U A080128 1566992840325479804,1785508810123564582,2003427950419417330 %N A080128 Number of primes less than n*10^19. %H A080128 Robert G. Wilson v, <a href="/A080128/b080128.txt">Table of n, a(n) for n = 1..100</a> %H A080128 Thomas R. Nicely, <a href="https://faculty.lynchburg.edu/~nicely/index.html">Some Results of Computational Research in Prime Numbers</a> [See local copy in A007053] %o A080128 (PARI) a(n)=primepi(10^19*n) \\ _Charles R Greathouse IV_, Apr 29 2015 %Y A080128 Cf. A038801, A028505, A038812, A038813, A038814, A038815, A038816, A038817, A038818, A038819, A038820, A038821, A080122, A080123, A080124, A080125, A080126, A080127, A080129. %K A080128 nonn %O A080128 1,1 %A A080128 _Robert G. Wilson v_ and _Jeff Burch_, Jan 29 2003