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 A189993 #10 Mar 30 2012 19:00:09 %S A189993 1,2,5,13,13,20,21,26,31 %N A189993 Length of the longest run of Ramanujan primes that are consecutive primes < 10^n. %H A189993 J. Sondow, <a href="http://arxiv.org/abs/0907.5232"> Ramanujan primes and Bertrand's postulate</a> Amer. Math. Monthly 116 (2009), 630-635. %H A189993 J. Sondow, J. W. Nicholson, and T. D. Noe, <a href="http://arxiv.org/abs/1105.2249"> Ramanujan Primes: Bounds, Runs, Twins, and Gaps</a>, J. Integer Seq. 14 (2011) Article 11.6.2. %e A189993 In the sequence of primes < 10^3, there is a run of 5 Ramanujan primes, but no longer run, so a(3) = 5. %Y A189993 Cf. A104272 (Ramanujan primes), A189994 (length of the longest run of non-Ramanujan primes < 10^n), A174602 (smallest prime that begins a run of n Ramanujan primes). %K A189993 nonn %O A189993 1,2 %A A189993 _Jonathan Sondow_, May 03 2011