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 A138535 #3 Mar 30 2012 18:52:52 %S A138535 13,17,31,41,61,73,89,109,113,131,151,163,193,199,211,229,233,241,281, %T A138535 307,313,337,379,397,401,421,461,463,521,523,541,577,593,601,613,617, %U A138535 631,661,673,701,727,757,761,769,811,829,859,881,883,911,937,941,953 %N A138535 Odd primes p_n for which A140140(n) < (p_n-1)/2, where p_n = n-th odd prime (A065091). %Y A138535 Cf. A140140, A137576, A065091, A138536. %K A138535 nonn %O A138535 1,1 %A A138535 _Vladimir Shevelev_, May 10 2008 %E A138535 Corrected and extended by _Ray Chandler_, May 19 2008