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 A291714 #9 Sep 16 2017 15:00:25 %S A291714 1260,1575,1680,1890,2016,2100,2205,2520 %N A291714 2520 * preferred ratios of room height / length in Alberti's Ten Books on Architecture. %H A291714 Radislav Zuk, <a href="https://link.springer.com/chapter/10.1007/978-3-319-00137-1_38">From Renaissance Musical Proportions to Polytonality in Twentieth Century Architecture</a>, Chapter 38 in Volume 1 of K. Williams and M. J. Ostwald (eds.), Architecture and Mathematics from Antiquity to the Future, DOI 10.1007/978-3-319-00137-1_38, Springer International Publishing Switzerland 2015 %e A291714 a(8)=2205 is in the sequence, because the length / height ratio of 2520/2205 corresponds to the referred ratio of 8/7 given in the table provided in A291713. %Y A291714 Cf. A291713, A291715, A291719. %K A291714 nonn,fini,full %O A291714 1,1 %A A291714 _Hugo Pfoertner_, Sep 01 2017