text: y [ ] [ ] is used for difference table with y [ ] [ 0 ] used for input
code: $ y ; for ( $ i = 0 ; $ i < $ n ; $ i ++ ) for ( $ j = 0 ; $ j < $ n ; $ j ++ ) $ y [ $ i ] [ $ j ] = 0.0 ; $ 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 ;