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 A124742 #4 Mar 30 2024 17:34:50
%S A124742 2,9,12,15,48,60,129,150,198,234,273,285,297,372,420,531,537,900,1065,
%T A124742 1086,1128,1746,1896,2187,2229,2244,2289,2415,2424,2577,2781,2877,
%U A124742 3108,3126,3630
%N A124742 Records in A124522.
%t A124742 skp[n_]:=Module[{k=1},While[AnyTrue[2n k+{1,-1},CompositeQ],k++];k]; DeleteDuplicates[ Join[{2},Array[skp,10^6,2]],GreaterEqual] (* The program generates the first 23 terms of the sequence. *) (* _Harvey P. Dale_, Mar 30 2024 *)
%Y A124742 Cf. A124522, A124743 (where records occur).
%K A124742 nonn
%O A124742 1,1
%A A124742 _Klaus Brockhaus_, Nov 07 2006