Suppose you have 2 vertices (points) – 1 red and 1 blue – how many ways can you join them together? There’s only way to do it, which is to draw a line between the 2 points.
Cayley's tree formula (after Andre Joyal)
Video_49: Number of Labelled Trees on n Vertices Part 1
Total number of Spanning Trees in a Graph - GeeksforGeeks
A) Cayley trees for 2, 3 and 4 vertices. (Bi) Vertex list v for
Solved How many trees on seven vertices are there up to
graphs and networks - Visualizing Cayley's Formula in Mathematica - Mathematica Stack Exchange
Counting labeled trees (Part 1)
Example for counting the number of edge labelled trees with a given
Trees SpringerLink
factorial – TOM ROCKS MATHS
Puzzles – TOM ROCKS MATHS