ArgumentOutOfRangeException: Argument is out of range error when used with for loop

In one one of my scripts, there is a 2D array that is iterated through every FixedUpdate(). Another script creates the nested elements. Every time though, I get an error that says ArgumentOutOfRangeException: Argument is out of range. Parameter name: index.

I've confirmed over and over again that the lists inside the lists, and the objects inside those nested lists exists through Debug.Log(). I can't figure out why the error is being thrown.

Here's the important code. The line where the error occurs is labeled:

FighterBehaviour.cs:

 public class Neuron
     {
         public List<float> weights = new List<float>();
         public float calculate(List<float> inputs)
         {
             float temp = 0;
             for(int i = 0; i < inputs.Count; i++)
             {
                 temp += inputs[i] * weights[i];
             }
             return temp;
         }
         public void generateWeights(float min, float max, int amount)
         {
             weights = new List<float>();
             for (int i = 0; i < amount; i++)
             {
                 weights.Add(Random.Range(min, max));
             }
         }
     }
     public void generateNeurons(int[] neurons)
     {
         for(int i = 0; i < neurons.Length; i++)
         {
             network.Add(new List<Neuron>());
             for(int j = 0; j < neurons[i]; j++)
             {
                 network[i].Add(new Neuron());
             }
         }
     }
 public List<List<Neuron>> network = new List<List<Neuron>>();
 
 void FixedUpdate () {
         List<float> inputs = new List<float>(4) { shotSeen, enemySeen, shotFired, FOVSize };
         List<float> outputs = new List<float>();
         for(int i = 0; i < network[0].Count;i++)
         {
             outputs.Add(network[0][i].calculate(inputs));
         }
         for(int i = 1; i < network.Count; i++)
         {
             List<float> temp2 = new List<float>();
             for(int j = 0; j < network[i].Count; i++)//This is the line the error always occurs
             {
                 temp2.Add(network[i][j].calculate(outputs));
             }
             outputs = new List<float>();
             for(int j = 0; j < temp2.Count; j++)
             {
                 outputs.Add(temp2[j]);
             }
         }
 }

SimulationManager.cs: public int population = 12; public float weightRange = 2f; public int[] networkStructure;

 void Start () {
         bots = new FighterBehaviour[population];
         for(int botIter = 0; botIter < population; botIter++)
         {
             bots[botIter] = Instantiate(bot);
             bots[botIter].gameObject.SetActive(false);
             bots[botIter].network = new List<List<FighterBehaviour.Neuron>>();
             bots[botIter].generateNeurons(networkStructure);
             for (int layerIter = 0; layerIter < networkStructure.Length; layerIter++)
             {
                 for(int neuronIter = 0; neuronIter < networkStructure[layerIter]; neuronIter++)
                 {
                     if(layerIter == 0)
                     {
                         bots[botIter].network[layerIter][neuronIter].generateWeights(-weightRange, weightRange, 4);
                     }else
                     {
                         bots[botIter].network[layerIter][neuronIter].generateWeights(-weightRange, weightRange, networkStructure[layerIter-1]);
                     }
                 }
             }
         }
     }