Pascal's Triangle is a triangular array of the binomial coefficients. It is constructed by starting with a row containing a single 1.
- Each number is the sum of the two numbers directly above it.
- The nth row contains the coefficients of the binomial expansion of (a + b)^n.
- Symmetry: Each row is symmetrical. The kth element equals the (n-k)th element.
- Fibonacci: If you sum the diagonals of the triangle, you get the Fibonacci sequence (1, 1, 2, 3, 5, 8...).