I was wondering if there was a general for formula to calculate the combination of the password lock for the current smart phones
The following is the condition
- We must use four nodes or more to make a pattern at least.
- Once anode is visited, then the node can't be visited anymore.
- You can start at any node.
- A pattern has to be connected.
- Cycle is not allowed.
If using 4 as the minimum string for the password with 9 nodes , the result is 389112.
Is there anyway to estimate the number of combinations for 16 nodes, 25 nodes and so on?