>> x=[0, ones(1,6)]/6

x =

         0    0.1667    0.1667    0.1667    0.1667    0.1667    0.1667

>> conv(x,x)

ans =

         0         0    0.0278    0.0556    0.0833    0.1111    0.1389    0.1667    0.1389    0.1111    0.0833    0.0556    0.0278

>> last=x;for i=1:99, last=conv(x,last);end ;
>> last(350)

ans =

    0.0233

>> stem([0:600],last)
>> 

>> help conv

 CONV Convolution and polynomial multiplication.
    C = CONV(A, B) convolves vectors A and B.  The resulting
    vector is length LENGTH(A)+LENGTH(B)-1.
    If A and B are vectors of polynomial coefficients, convolving
    them is equivalent to multiplying the two polynomials.
 
    See also DECONV, CONV2, CONVN, FILTER and, in the Signal
    Processing Toolbox, XCORR, CONVMTX.

 Overloaded methods
    help gf/conv.m

>>