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 A049490 #16 Sep 06 2014 00:11:55 %S A049490 3,7,19,37,43,67,73,103,109,127,163,193,199,229,283,337,367,379,397, %T A049490 439,457,499,523,577,613,619,709,733,757,823,877,883,907,919,967,997, %U A049490 1033,1039,1087,1117,1123,1129,1153,1213,1237,1297,1303,1423,1429,1447 %N A049490 a(n) and a(n)+64 both prime. %H A049490 Zak Seidov, <a href="/A049490/b049490.txt">Table of n, a(n) for n = 1..1000</a> %e A049490 19 and 19+64=83 both prime. %t A049490 Select[Prime[Range[300]],PrimeQ[#+64]&] (* _Harvey P. Dale_, Mar 21 2011 *) %o A049490 (PARI) select(p -> isprime(p+64),primes(1000)) \\ _Edward Jiang_, Sep 05 2014 %Y A049490 Cf. A001359, A023200, A023202. %K A049490 nonn %O A049490 1,1 %A A049490 _Labos Elemer_