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 A073704 #4 Mar 30 2012 18:50:25 %S A073704 7,11,13,17,29,29,37,41,53,61,67,79,89,89,97,109,131,127,137,149,149, %T A073704 163,173,181,197,233,211,227,223,229,257,269,277,281,311,307,317,331, %U A073704 337,349,389,367,389,389,397,401,433,449,457,461,479,491,487,509,521 %N A073704 Smallest prime p such that also p-prime(n)*2 is a prime. %Y A073704 Cf. A073703, A001747, A000040, A020484. %K A073704 nonn %O A073704 1,1 %A A073704 _Reinhard Zumkeller_, Aug 04 2002