Algorithm E =E=(1+2)x(1+2+3)x(1+2+3+4)x…x(1+2+3+…+(N-2)+(N-1)+N), et (N≥2)

Question

I can\'t resolved this algorithm pkease help me write an algorithm to calculate the value of the expression E E =(1+2)x(1+2+3)x(1+2+3+4)x…x(1+2+3+…+(N-2)+(N-1)+N), (N≥2).