Probably Art # 302: Circle

18 circles drawn in 1 shade(s) chosen from 8 unique size(s).

$$ s = .00330152, \; $$ $$ | \lbrace \theta \rbrace | = 1, $$ $$ | \lbrace r \rbrace | = 8,$$ $$ r_0 = 0.0500,$$ $$ R = 1.00, $$ $$r \sim \beta(1.924, 1.863), $$ $$\theta \sim \beta(1.000, 1.000). $$