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 A007636 M4996 #22 Sep 08 2022 08:44:35 %S A007636 16,17,20,25,32,33,34,36,39,41,43,48,50,51,52,54,55,58,61,65,66,67,68, %T A007636 69,71,74,77,78,80,83,84,85,88,89,90,93,94,96,97,99,100,101,102,105, %U A007636 106,107,111,112,115,116,117,118,119,122,124,126,131,134,135,136,137 %N A007636 Numbers k such that k^2 + k + 17 is composite. %C A007636 Complement of A028823. - _Michel Marcus_, Jun 17 2013 %D A007636 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A007636 Vincenzo Librandi, <a href="/A007636/b007636.txt">Table of n, a(n) for n = 1..3500</a> %t A007636 Select[Range[200], !PrimeQ[#^2 + # + 17] &] (* _Vincenzo Librandi_, Jun 08 2017 *) %o A007636 (Magma) [n: n in [0..200]| not IsPrime(n^2+n+17)]; // _Vincenzo Librandi_, Jun 08 2017 %K A007636 nonn,easy %O A007636 1,1 %A A007636 _N. J. A. Sloane_, _Mira Bernstein_, _Robert G. Wilson v_