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 A063501 #25 Feb 10 2022 22:52:50 %S A063501 0,1,2,2,5,5,18,82,317,1613,8626,50408,303828,1911246,12432129, %T A063501 83217782,571314626 %N A063501 Number of prime-sextuplets up to 10^n. %H A063501 Norman Luhn, <a href="http://www.pzktupel.de/counting/PI_06.html">PI_6(10^n)</a> %H A063501 <a href="/index/Pri#primepop">Index entries for sequences related to numbers of primes in various ranges</a> %e A063501 a(12)=50408 because there are 50408 prime-sextuplets up to 10^12. %Y A063501 Cf. A022008 (initial members of prime-sextuplets). %K A063501 nonn,more %O A063501 1,3 %A A063501 _Martin Raab_, Jul 30 2001 %E A063501 2 more terms from _Martin Raab_, Oct 06 2005 %E A063501 a(17) from _Norman Luhn_, Nov 08 2021