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 A107257 #6 Dec 12 2015 04:17:23 %S A107257 5,7,11,11,13,17,17,19,23,23,29,29,29,31,37,37,37,41,41,43,47,47,53, %T A107257 53,53,59,59,59,61,67,67,67,71,71,73,79,79,79,83,83,89,89,89,101,101, %U A107257 101,101,101,101,103,107,107,109,113,113,131,131,131,131,131,131,131,131 %N A107257 Smallest prime p such that for each j <= n there are primes a < b <= p whose difference b - a is 2*j. %C A107257 Every positive even number <= 2*n is the difference of two suitable primes <= a(n). %C A107257 Sequence is nondecreasing, whereas the related sequence A020484 is not; first divergence is at 45: a(45) = 101, A020484(45) = 97. %e A107257 Consider n = 45: 89, 97, 101 are consecutive primes, 2*45 = 97 - 7, but 2*44 = 101 - 13 cannot be written as b - a where a and b are primes <=97, hence a(45) = 101. %Y A107257 Cf. A060264, A020484. %K A107257 nonn %O A107257 1,1 %A A107257 _Klaus Brockhaus_, May 15 2005