MATLAB: How can i display this sequence in a graph

#scriptorfunctionhelpsequence

x_n = (n.^2-1)/n.^2

Using Matlab.

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

n=1:20
x=3*(-1/4).^n
stem(n,x)

Try this

x(1)=0.9;
for n = 1:100
x(n+1)=x(n)*(1-x(n))*2.5;
end
plot(x)

In your code, you are just plotting one point at a time and then overwriting it with a new plot statement.