Performing Excel formula in Python

Question

import numpy

K = 1
Rmv = 26
SigS = 111.7
M = 2.050
N = 2
SigD = (-249.4)


def Mittelspannung():
    result = [] 

    Y = []

    SigM = []

    for i in range(1,31):
        output = 1 - pow((((i-1)*1/14.5)-1),2)
        #Z = Rmv - (output*Rmv)
        result.append(output)
        #print(output)   
   
    for value in range(0,15):
        C4 = (Rmv) - (result[value]) * (Rmv)
        Y.append(C4)
        print(C4)    

    for value in range(15,30):                
        B11 = (SigD) - (result[value]) * (SigD)
        Y.append(B11)
        print(B11) 
          
    for x in range(0,30):    
        SigMean = pow(SigS,M) * pow(1-(pow(Y[x]+SigS,N)/(pow(Rmv+SigS,N))),1/M)
        #SigMean = (pow(SigS,M) * pow(1-((Y[x]+SigS)/(Rmv+SigS),N/M))/K
        #($C$5^$C$6*(1-($N4+$C$5)^$C$8/($C$4+$C$5)^$C$8))^(1/$C$6)
        SigM.append(SigMean) 
        #print(Y[value])
    return SigM


print(Mittelspannung())

From the above script I can execute the output same as excel. But, the last for loop I couldn't get the output same as Excel. I also mentioned the Excel formula in my code.

The output for SigM in Excel is 25.8 but in Python I'm getting 3650.9824739444566.