Manual triangle wave generation

Hello

I want to generate a triangle wave without built in function and I want to do it using this formula

Unfortunately, the output plot is not looking right

I'd appreciate any suggestions

clc;
clear all;

A = 1;
f = 1;
fs = 1000;
t = 0 : 1/fs : 10;
n = [300];
omega0 = 2 * pi * f;


for i = 1 : length(n)
    b = 0;
    
    for j = 1 : 2 : n(i)
        H = [0 : 0.5 : n(i)];
        sr = (1 / j) * (-1)^H(j) *sin(j * omega0 * t); 
        b = b + sr;
    
    end
    b = ( 8 * A / pi ^ 2 ) * b;
    figure()
    plot(t, b)
end

Answer 1

[KSSV]

A = 1;
f = 1;
fs = 1000;
t = 0 : 1/fs : 10;
n = [300];
omega0 = 2*pi*f;

K = 8*A/pi^2 ; 
N = 20 ;   % can be changed 
x = zeros(size(t)) ; 
for i = 0:N
  x = x+(-1)^i*1/(2*i+1)*sin((2*i+1)*omega0*t) ; 
end
plot(t,x)

[quando]

It's the same plot, it's not triangle wave