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 A064270 #16 Jun 24 2018 18:30:49
%S A064270 2,3,7,11,19,29,37,43,79,83,139,149,179,197,251,269,307,349,373,397,
%T A064270 491,683,709,733,829,859,883,971,997,1093,1153,1289,1429,1433,1453,
%U A064270 1511,1531,1549,1637,1699,1721,1931,1993,1999,2029,2053,2063,2161,2203
%N A064270 Primes of the form prime(k) - k; or primes arising in A014689.
%H A064270 Harry J. Smith, <a href="/A064270/b064270.txt">Table of n, a(n) for n = 1..1000</a>
%t A064270 t={}; Do[If[PrimeQ[q=Prime[n]-n], AppendTo[t,q]], {n,378}]; t (* _Jayanta Basu_, May 14 2013 *)
%o A064270 (PARI) j=[]; for(n=1,500, if(isprime(prime(n)-n), j=concat(j, prime(n)-n))); j
%o A064270 (PARI) { n=0; for (m=1, 10^9, if (isprime(prime(m) - m), write("b064270.txt", n++, " ", prime(m) - m); if (n==1000, break)) ) } \\ _Harry J. Smith_, Sep 11 2009
%Y A064270 Cf. A064269.
%K A064270 easy,nonn
%O A064270 1,1
%A A064270 _Jason Earls_, Sep 23 2001