@article{10.4169/math.mag.87.5.323,
ISSN = {0025570X, 19300980},
URL = {http://www.jstor.org/stable/10.4169/math.mag.87.5.323},
abstract = {Summary It’s the age-old recurrence with a twist: sum the last two terms and if the result is composite, divide by its smallest prime divisor to get the next term (e.g., 0, 1, 1, 2, 3, 5, 4, 3, 7,…). These sequences exhibit pseudo-random behavior and generally terminate in a handful of cycles, properties reminiscent of 3x + 1 and related sequences. We examine the elementary properties of these “subprime” Fibonacci sequences.},
author = {Richard K. Guy and Tanya Khovanova and Julian Salazar},
journal = {Mathematics Magazine},
number = {5},
pages = {323--337},
publisher = {Mathematical Association of America},
title = {Conway’s Subprime Fibonacci Sequences},
volume = {87},
year = {2014}
}