In mathematics, Pascal's triangle is a triangular array of the binomial coefficients.It is called YangHui triangular in china.
The entries of Pascal's triangle in each row are numbered from the left beginning with k = 0 and are usually staggered relative to the numbers in the adjacent rows.
1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 1 7 21 35 35 21 7 1