Probability table for branches that are allowed to evolve for three time steps.

The first entry in this table is identical to first entry of Table 1, representing a neurite that branched at the first time step and stopped evolving. The second scenario involves a neurite that branches and stops evolving after extending for two previous time steps. This event has an overall probability p·q. Finally, the last entry again corresponds to a neurite that grows to the largest possible extent, for a total length of three at the end of the third time step, and it has the potential to grow even further at later times. The probability of the second scenario is q2.