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 A164014 #20 Nov 13 2012 23:58:45 %S A164014 12,24,32,48,60,108,240,384,480,608,972,984,1020,2688 %N A164014 Numbers n for which the Hurwitz equation (x_1)^2 + (x_2)^2 + ... + (x_n)^2 = z * x_1 * x_2 * ... * x_n has solutions only for z = n. %C A164014 Conjectured finite. Any further terms are greater than 10^8. %H A164014 A. Hurwitz, <a href="http://www.archive.org/stream/archivdermathem16unkngoog#page/n207/mode/2up">Über eine Aufgabe der unbestimmten Analysis</a>, Archiv der Mathematik und Physik 11 (1907) pp. 185-196. %H A164014 Norman P. Herzberg, <a href="http://projecteuclid.org/euclid.pjm/1102913235">On a problem of Hurwitz</a>, Pacific Journal of Mathematics 50 (1974), pp. 485-493. %H A164014 Ioulia Baoulina and Florian Luca, <a href="http://ami.ektf.hu/uploads/papers/finalpdf/AMI_35_from11to19.pdf">On positive integers with a certain nondivisibility property</a>, Annales Mathematicae et Informaticae 35 (2008), pp. 11-19. %K A164014 nonn,more %O A164014 1,1 %A A164014 _Charles R Greathouse IV_, Jul 26 2011 %E A164014 Definition corrected by _Max Alekseyev_, Nov 13 2012