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 A291713 #13 Sep 16 2017 15:00:10 %S A291713 36,48,54,64,72,81,96,108,144 %N A291713 144 * preferred ratios of room width / length in Alberti's Ten Books on Architecture. %C A291713 Coincides with A114334(14) ... A114334(22) (Divisors of 6^6). %H A291713 Radislav Zuk, <a href="https://doi.org/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 A291713 The following table is provided in the Zuk article: %e A291713 . %e A291713 Table 38.9 Proportions derived from Alberti's preferred ratios %e A291713 Plan Length Mean L : H : W %e A291713 ratio Width Height %e A291713 1:1 1 1 Any mean 1 1 : 1 : 1 %e A291713 3:2 6 4 Arithmetic 5 6 : 5 : 4 %e A291713 3:2 15 10 Harmonic 12 15 :12 :10 %e A291713 4:3 8 6 Arithmetic 7 8 : 7 : 6 %e A291713 2:1 4 2 Arithmetic 3 4 : 3 : 2 %e A291713 9:4 9 4 Geometric 6 9 : 6 : 4 %e A291713 16:9 16 9 Geometric 12 16 :12 : 9 %e A291713 3:1 3 1 Arithmetic 2 3 : 2 : 1 %e A291713 8:3 8 3 Fibonacci 5 8 : 5 : 3 %e A291713 4:1 4 1 Geometric 2 4 : 2 : 1 %e A291713 . %e A291713 a(8)=108 is in the sequence, because the ratio 144/108 corresponds to the plan ratio of 4:3. %Y A291713 Cf. A114334, A291714, A291715, A291719. %K A291713 nonn,fini,full %O A291713 1,1 %A A291713 _Hugo Pfoertner_, Aug 30 2017