Simulation and analytic results of the distribution of the number of cooperators for large values of .

<p>The system size is and the mutation rates are and , respectively. Simulation lasts for time steps while the analytical solution is presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0049663#pone.0049663.e197" target="_blank">Eq. (8)</a>.