#Calculation of the Fibonacci Sequence
#We want to calculate N elements
N = 15
a_n_prev = 1 #The first two elements are defined like 1
a_n = 1
for n in range(2,N):
a_n_new = a_n + a_n_prev #Calculate the new value according to formula
print(a_n_new) #Print it to the screen
a_n_prev = a_n #Change the previous element to the current one
a_n = a_n_new #Change the current element to the new