y [ ] [ ] is used for divided difference table where y [ ] [ 0 ] is used for input
y [ 0 ] [ 0 ] = 12 ; NEW_LINE y [ 1 ] [ 0 ] = 13 ; NEW_LINE y [ 2 ] [ 0 ] = 14 ; NEW_LINE y [ 3 ] [ 0 ] = 16 ; NEW_LINE