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 A189994 #8 Mar 30 2012 19:00:09 %S A189994 3,4,7,13,20,36,47,47,65 %N A189994 Length of the longest run of consecutive primes < 10^n that are not Ramanujan primes. %H A189994 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 A189994 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 A189994 Of the 4 primes < 10^1, the last 3 are not Ramanujan primes, so a(1) = 3. %Y A189994 Cf. A104272 (Ramanujan primes), A189993 (length of the longest run of Ramanujan primes < 10^n), A174641 (smallest prime that begins a run of n non-Ramanujan primes). %K A189994 nonn %O A189994 1,1 %A A189994 _Jonathan Sondow_, May 03 2011