MATLAB: How can i complete the sequence till n=50

discrete time equationdsphomework

Consider the following formula

x[n]=x[n-1]+x[n-3]
x[0]=0
x[1]=1
x[2]=2

Here's a start:

x = zeros(1, 50);
x(1:3) = [0,1,2]
for n = 4 : length(x)

I'm sure you can finish the last two lines.

n=.05:.01:.3;
x_n=(n.^2-1)./(n.^2);
plot(n,x_n);

Keeping your code intact for most of the part, this is a quick fix

x = zeros(2,50);
x(:,1) = [1;0];
A = [1.52 -.7; .56 .4];
for k = 2:50
    x(:,k) = A*x(:,k-1);
end
disp(x(:,10))
disp(x(:,20))