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 A086304 #13 Sep 08 2022 08:45:11 %S A086304 1,5,7,11,13,17,23,25,31,35,37,41,47,53,55,61,65,67,73,77,83,91,95,97, %T A086304 101,103,107,121,125,131,133,143,145,151,157,161,167,173,175,185,187, %U A086304 191,193,205,217,221,223,227,233,235,245,251,257,263,265,271,275,277 %N A086304 Numbers n such that n+6 is prime. %D A086304 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988 %D A086304 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997 %H A086304 Vincenzo Librandi, <a href="/A086304/b086304.txt">Table of n, a(n) for n = 1..1000</a> %F A086304 a(n) = 2*A089038(n+1)-1. %t A086304 Select[Range[0, 900], PrimeQ[# + 6] &] (* _Vincenzo Librandi_, Oct 16 2012 *) %o A086304 (Magma) [n: n in [0..300]| IsPrime(n + 6)]; // _Vincenzo Librandi_, Oct 16 2012 %o A086304 (PARI) is(n)=isprime(n+6) \\ _Charles R Greathouse IV_, May 22 2017 %Y A086304 Cf. A089038. %K A086304 nonn,easy %O A086304 1,2 %A A086304 _Giovanni Teofilatto_, Aug 29 2003 %E A086304 Corrected and extended by _Ray Chandler_, Nov 29 2003