Pascal's triangle online calculator

Online calculator which helps you to build Pascal's triangle.
Pascal's triangle is an infinite table, in this table uses the binomial coefficients, and the table is presented in the form of a triangle.
The top of the table and the sides of each line are units, the other numbers (in the middle) is the sum of 2 numbers which are in the previous line (over them).

Indicate the number of lines (N):