y [ ] [ ] is used for difference table with y [ ] [ 0 ] used for input
y = [ [ 0 for i in range ( n ) ] for j in range ( n ) ] ; NEW_LINE y [ 0 ] [ 0 ] = 4.000 ; NEW_LINE y [ 1 ] [ 0 ] = 3.846 ; NEW_LINE y [ 2 ] [ 0 ] = 3.704 ; NEW_LINE y [ 3 ] [ 0 ] = 3.571 ; NEW_LINE y [ 4 ] [ 0 ] = 3.448 ; NEW_LINE y [ 5 ] [ 0 ] = 3.333 ; NEW_LINE