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 A135657 #8 Sep 08 2022 08:45:32
%S A135657 55,175,247,295,319,343,391,415,511,535,559,583,655,679,703,775,799,
%T A135657 847,871,895,943,1015,1111,1135,1159,1183,1207,1255,1351,1375,1495,
%U A135657 1519,1591,1615,1639,1687,1711,1735,1807,1855,1903,1927,1975,2023,2047,2071
%N A135657 Nonprimes of the form 24n+7.
%H A135657 Vincenzo Librandi, <a href="/A135657/b135657.txt">Table of n, a(n) for n = 1..1000</a>
%t A135657 a = {}; Do[If[PrimeQ[24n + 7],[null], AppendTo[a, 24n + 7]], {n, 0, 1000}]; a
%t A135657 Select[24 Range[100] + 7, ! PrimeQ@# &] (* _Vincenzo Librandi_, Mar 22 2014 *)
%o A135657 (Magma) [a: n in [0..100] | not IsPrime(a) where a is 24*n+7]; // _Vincenzo Librandi_, Mar 22 2014
%Y A135657 Cf. A107006, A124477.
%K A135657 nonn,easy
%O A135657 1,1
%A A135657 _Artur Jasinski_, Nov 25 2007