Nonlinear recurrences draws its title from sequences in which the relation of the successive terms are a nonlinear function of the previous terms. The musical material is obtained by mapping the Hofstadter’s Q sequence, one of the paradigmatic examples of nonlinear recurrences. It is the third of the Metaludios that requires pre-recorded electronics. In this case, a sampled piano is tuned the usual way (12-ET) and another in the Bohlen-Pierce scale (13-ET). It also features sounds generated from massive additive synthesis of a fractal image. This Metaludio also requires the use of a neodymium magnet on the strings to accomplish new sounds. The dedicatee is composer Rubens Askenar.