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 A365242 #26 Sep 25 2023 20:00:17
%S A365242 12,540540,928620,960120,9074520,10199700,26460000,44186940,46787580,
%T A365242 66459960,67723740,71901900,94884300,98698320,109495260,115796520,
%U A365242 126556920,134276940,140943600,157861620,196226100,197520120,202498380
%N A365242 Numbers k such that k+1, k-1, k/2+1, k/2-1, k/3+1 and k/3-1 are all prime.
%C A365242 It can be proven that except for a(1) = 12, a(n) = {0, 1260, 3780, 10080, 12600} (mod 13860).
%Y A365242 Cf. A076504.
%K A365242 nonn
%O A365242 1,1
%A A365242 _Joshua Graham_, Aug 28 2023