# Arithmetic progression
An arithmetic progression or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant.
1 2 3 4 5 ...
1 3 5 7 9 ...
5 9 13 ...
1
2
3
2
3
In general,
# Example
numbers = [1, 3, 5, 7, 9]
def an(am, n, d):
return am + (n*d)
a0 = numbers[0]
d = 2
print(numbers[0] == an(a0, 0, d))
print(numbers[1] == an(a0, 1, d))
print(numbers[2] == an(a0, 2, d))
print(numbers[3] == an(a0, 3, d))
print(numbers[4] == an(a0, 4, d))
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2
3
4
5
6
7
8
9
10
11
12
13
14
OUTPUT
True
True
True
True
True