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 A338868 #28 Apr 20 2023 10:11:39 %S A338868 0,0,0,0,0,0,0,0,0,0,0,2,3,9,28,138,613,2799 %N A338868 Number of triples of prime quadruples < 10^n. %C A338868 Number of triples of prime quadruples with at most n digits. A triple of prime quadruples consists of three prime quadruples with a (minimal) distance of 120. %H A338868 J. Brüggemann, <a href="http://ymmij.de/Nerd/p4/p4-3.pdf">The first triples of prime quadruples</a>. [broken link] %H A338868 J. Brüggemann, <a href="http://ymmij.de/Nerd/p4/calculation.pdf">Calculating prime quadruples, its twins, triples and quadruples</a>. [broken link] %e A338868 For n=12 the a(12)=2 solutions are [(282005261771, 282005261773, 282005261777, 282005261779), (282005261801, 282005261803, 282005261807, 282005261809) , (282005261891, 282005261893, 282005261897, 282005261899)] and [(783976940441, 783976940443, 783976940447, 783976940449), (783976940471, 783976940473, 783976940477, 783976940479), (783976940531, 783976940533, 783976940537, 783976940539)]. %Y A338868 Cf. A050258, A338866. %K A338868 nonn,more %O A338868 1,12 %A A338868 _Hans H. Brüggemann_, Nov 13 2020 %E A338868 a(18) corrected by _Hans H. Brüggemann_, May 16 2021