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 A167838 #10 Jun 19 2016 21:43:02
%S A167838 2,211,293,631,787,797,839,1249,1259,1399,1409,1471,1511,1637,1709,
%T A167838 1801,1811,1847,1889,2039,2053,2099,2179,2503,2521,2579,2633,2647,
%U A167838 2767,2777,2819,2927,2939,3109,3137,3271,3433,3571,3593,3659,3779,3833,3863,3967
%N A167838 Four-times-isolated primes: primes p such that neither p+-2, p+-4, p+-6 nor p+-8 is prime.
%C A167838 2 together with (A137871: prime numbers isolated from neighboring primes by more than 8).
%H A167838 Robert Israel, <a href="/A167838/b167838.txt">Table of n, a(n) for n = 1..10000</a>
%e A167838 a(1)=2 (-6,-4,-2,0,4,6,8,10 are nonprimes); a(2)=211 (203,205,207,209,213,215,217,219 are nonprimes).
%p A167838 Primes:= select(isprime, {2,seq(i,i=3..10000,2)}):
%p A167838 S:=Primes minus `union`(seq(map(`+`,Primes, i),i=[-2,2,-4,4,-6,6,-8,8])):
%p A167838 sort(convert(S,list)); # _Robert Israel_, Jun 19 2016
%Y A167838 Cf. A137871, A167771.
%K A167838 nonn
%O A167838 1,1
%A A167838 _Juri-Stepan Gerasimov_, Nov 13 2009
%E A167838 Corrected by _Robert Israel_, Jun 19 2016