text: y [ , ] is used for difference table with y [ , 0 ] used for input
code: double [ , ] y = new double [ n , n ] ; y [ 0 , 0 ] = 4.000 ; y [ 1 , 0 ] = 3.846 ; y [ 2 , 0 ] = 3.704 ; y [ 3 , 0 ] = 3.571 ; y [ 4 , 0 ] = 3.448 ; y [ 5 , 0 ] = 3.333 ;