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 A111292 #16 Sep 12 2024 16:06:29 %S A111292 1,2,3,5,7,8,9,10,12,13,18,19,20,22,23,30,31,32,33,35,36,38,41,42,43, %T A111292 45,46,47,51,55,58,60,65,67,73,74,77,78,84,86,88,93,95,97,100,101,104, %U A111292 106,107,109,112,117,120,123,124,126,129,130,132,134,135,137,143,148,151 %N A111292 Numbers n such that 6*n^2 + 6*n + 1 is prime. %e A111292 If n=43 then 6*n^2 + 6*n + 1 = 11353 (prime). %o A111292 (Magma) [n: n in [0..200] |IsPrime(6*n^2+6*n+1)]; // _Vincenzo Librandi_, Nov 13 2010 %o A111292 (PARI) is(n)=isprime(6*n^2+6*n+1) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A111292 Cf. A111251, A090563. %K A111292 nonn,easy %O A111292 1,2 %A A111292 _Parthasarathy Nambi_, Nov 01 2005