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 A070076 #18 Apr 07 2015 10:50:20 %S A070076 2,6,27,170,1019,6945,50811,381332,2984194,23988173,196963369, %T A070076 1646209172,13964079652,119945656793,1041428920639,9126986454994, %U A070076 80644643655861,717727049224277 %N A070076 Number of n-digit twin prime pairs. %D A070076 Jean-Marie De Koninck, Armel Mercier: 1001 Problems in Classical Number Theory, American Mathematical Society, 2007 - from Eva-Maria Zschorn (e-m.zschorn(AT)zaschendorf.km3.de), Mar 23 2010 %D A070076 Paulo Ribenboim: The New Book of Prime Number Records (3. Auflage), Springer-Verlag Berlin, 1996 - from Eva-Maria Zschorn (e-m.zschorn(AT)zaschendorf.km3.de), Mar 23 2010 %H A070076 Anonymous, <a href="http://www.mathematical.com/twindex2to1b.htm">Twin Prime Index(1 through 394000000)</a> %H A070076 X. Gourdon & P. Sebah, <a href="http://numbers.computation.free.fr/Constants/Primes/primeonline.html">Online computation of the first primes and twin primes up to 50000</a> %H A070076 Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/primes.html">Tables of values of pi(x) and of pi2(x)</a> %F A070076 a(n) = A007508(n) - A007508(n-1) [From Max Alekseyev, Jun 16 2011] %e A070076 n=1: a(1)=2 pairs: (3,5), (5,7). %e A070076 n=2: a(2)=6 pairs: (11,13), (17,19), (29,31), (41,43), (59,61), (71,73). %Y A070076 Cf. A007508. %K A070076 hard,more,nonn,base %O A070076 1,1 %A A070076 _Lekraj Beedassy_, May 06 2002 %E A070076 a(6) corrected by _Harvey P. Dale_, Sep 02 2008 %E A070076 a(9) corrected and a(15)-a(18) from _Donovan Johnson_, Apr 25 2010