Coloured Graphs (noch nicht übersetzt)
Problem 677
Let g(n) be the number of undirected graphs with n nodes satisfying the following properties:
- The graph is connected and has no cycles or multiple edges.
- Each node is either red, blue, or yellow.
- A red node may have no more than 4 edges connected to it.
- A blue or yellow node may have no more than 3 edges connected to it.
- An edge may not directly connect a yellow node to a yellow node.
For example, g(2)=5, g(3)=15, and g(4)=57.
You are also given that g(10)=710249 and g(100)≡919747298(mod1000000007).
Find g(10000)mod1000000007.