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%I #11 Sep 16 2017 15:00:39
%S 210,252,280,315,336,350,360,420
%N a(n) = 420*(preferred ratios of room width / height in Alberti's Ten Books on Architecture).
%H 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 a(5)=336 is in the sequence, because the height / width ratio of 420 / 336 corresponds to the preferred ratio of H:W = 5:4 provided in the table given in A291713.
%Y Cf. A291713, A291714, A291719.
%K nonn,fini,full
%O 1,1
%A _Hugo Pfoertner_, Sep 01 2017
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