Diff 0

Diff 1

Diff 2

$\cdots$

1^st Row

$y_1$

2^nd Row

$y_2$

$y_2-y_1$

3^rd Row

$y_3$

$y_3-y_2$

$y_3-2y_2+y_1$

$\cdots$

$\cdots$

$\cdots$

$\cdots$

n^th Row

$y_n$

$y_n-y_{n-1}$

$y_n-2y_{n-1}+y_{n-2}$