HILB	Hilbert matrix.
 	HILB(N) is the N by N matrix with elements 1/(i+j-1),
 	which is a famous example of a badly conditioned matrix.
 	See INVHILB for the exact inverse.
 
 	This is also a good example of efficient MATLAB programming
 	style where conventional FOR or DO loops are replaced by
 	vectorized statements.  This approach is faster, but uses
 	more storage.