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 A103709 #12 Oct 27 2017 09:13:04 %S A103709 5,0,53,0,0,211,0,0,20201,0,0,16787,0,0,69623,0,0,255803,0,0,247141,0, %T A103709 0,3565979,0,0,6314447,0,0,4911311,0,0,12012743,0,0,23346809,0,0, %U A103709 43607429,0,0,34346287,0,0,36598607,0,0,51042053,0,0,460475569,0,0 %N A103709 Smallest prime p such that both p +/- 2n are primes closest to p, or zero if no such prime exists. %C A103709 Such triples of primes occur only for n divisible by 3 (except for the first term with n=1). %F A103709 p-2n, p and p+2n are three successive primes and p is the least such prime. %e A103709 a(36)=23346809 because 23346809-72, 23346809 and 23346809+72 are three successive primes and 23346809 is the least such prime. %Y A103709 Cf. A054342, A102723, A023186. %K A103709 nonn %O A103709 1,1 %A A103709 _Zak Seidov_, Feb 12 2005 %E A103709 More terms from _Robert G. Wilson v_, Feb 22 2005 %E A103709 Definition, Formula, and Example clarified by _Jonathan Sondow_, Oct 27 2017