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 A321617 #40 Feb 10 2019 14:05:35
%S A321617 15,35,95,219,221,903,905,1357
%N A321617 Last term of the first occurrence of n consecutive odd squarefree composite numbers.
%C A321617 See A322493.
%t A321617 Join[{15},With[{osc=Select[Range[1,1401,2],CompositeQ[#]&&SquareFreeQ[ #]&]}, Flatten[Table[Select[Partition[osc,n,1],Union[Differences[#]] == {2}&,1],{n,8}],1]][[All,-1]]] (* _Harvey P. Dale_, Feb 10 2019 *)
%Y A321617 Cf. A024556, A322493.
%K A321617 nonn,fini,full
%O A321617 1,1
%A A321617 _Hugo Pfoertner_, Dec 19 2018