A set of lattice points is called a titanic set if there exists a line passing through exactly two points in .
An example of a titanic set is , where the line passing through and does not pass through any other point in .
On the other hand, the set is not a titanic set since the line passing through any two points in the set also passes through the other two.
For any positive integer , let be the number of titanic sets whose every point satisfies .
It can be verified that , , , and .
Find .
Write-up coming later
The complete problem is available here. An approach, code, and answer will be added later.